Abstract and Introduction 
 
 Abstract 
 
 In 1994 the National Football League (NFL) initiated a comprehensive clinical and biomechanical research study of mild traumatic brain injury (TBI), a study that is ongoing. Data on mild TBIs sustained between 1996 and 2001 were collected and submitted by NFL team physicians and athletic trainers, and these data were analyzed by the NFL's Committee on Mild Traumatic Brain Injury. At the same time, analysis of game videos was performed for on-field mild TBIs to quantify the biomechanics involved and to develop means to improve the understanding of these injuries so that manufacturers could systematically improve and update their head protective equipment. The findings and analysis of the Committee have been presented in a series of articles in Neurosurgery. 
 
 Introduction 
 
 In 1992 Al Toon, who was a wide receiver for the New York Jets, was the first NFL player known to have retired because of postconcussion syndrome.[2] The year after Mr. Toon's retirement, another player, Merrill Hoge of the Chicago Bears, retired because of the same problem. Commissioner Paul Tagliabue, team physicians, and many others raised questions: was this a new problem or a misdiagnosed or unrecognized one? Was this a statistical anomaly or the beginning of an epidemic? 
 
 It was decided that a rigorous, scientific approach was necessary to gather the data to answer these questions for this high-profile professional sports league. In 1994, Commissioner Tagliabue approved the creation of the NFL's Committee on Mild Traumatic Brain Injury.[12] The Committee was composed of experts inside and outside the NFL. It was decided by the Committee that protection against in jury as well as collection and analysis of injury data would be critical to the success of their mission. For the study, a reportable mild TBI was defined as a traumatically induced alteration in brain function manifested by an alteration of awareness and consciousness, including but not limited to an LOC, a "ding," a sensation of being dazed or stunned, a sensation of "wooziness" or "fogginess," a seizure or amnesic period, and by symptoms commonly associated with postconcussion syndrome, including persistent headaches, vertigo, lightheadedness, loss of balance, unsteadiness, syncope, near-syncope, cognitive dysfunction, memory disturbances, hearing loss, tinnitus, blurred vision, diplopia, visual loss, personality change, drowsiness, lethargy, fatigue, and inability to perform usual daily activities.[10] The research summarized here was developed, supervised, and completed in response to the stated goals of the NFL's Committee on Mild Traumatic Brain Injury. ||||| Penalty run-ups are just getting ridiculous ... 
 
 Deliberate, yes? We think so. Look at the replay from side on. Look at the cheeky glimpse he gives the referee. Look at the way he's not clutching his face in agony and/or shame. 
 
 Rather incredibly, this wasn't even a friendly. This was in a penalty shootout, following the 3rd/4th place playoff of the AFC Challenge Cup, a tournament held by the Asian Football Confederation for "emerging nations". Sadly for our penalty taker, Afghanistan went on to lose the shootout 8-7. Congrats to the Maldives. 
 
 Now, who's going to try this in Brazil? ||||| INTRODUCTION: 
 
 This study aimed to use video analysis techniques to determine the velocity, impact force, angle of impact, and impulse to fracture involved in a video-recorded bicycle accident resulting in facial fractures. Computed tomographic images of the resulting facial injury are presented for correlation with data and calculations. To our knowledge, such an analysis of an actual recorded trauma has not been reported in the literature. 
 
 MATERIALS AND METHODS: 
 
 A video recording of the accident was split into frames and analyzed using an image editing program. Measurements of velocity and angle of impact were obtained from this analysis, and the force of impact and impulse were calculated using the inverse dynamic method with connected rigid body segments. These results were then correlated with the actual fracture pattern found on computed tomographic imaging of the subject's face. 
 
 RESULTS: 
 
 There was an impact velocity of 6.25 m/s, impact angles of 14 and 6.3 degrees of neck extension and axial rotation, respectively, an impact force of 1910.4 N, and an impulse to fracture of 47.8 Ns. These physical parameters resulted in clinically significant bilateral mid-facial Le Fort II and III pattern fractures. 
 
 DISCUSSION: 
 
 These data confer further understanding of the biomechanics of bicycle-related accidents by correlating an actual clinical outcome with the kinematic and dynamic parameters involved in the accident itself and yielding a concrete evidence of the velocity, force, and impulse necessary to cause clinically significant facial trauma. These findings can aid in the design of protective equipment for bicycle riders to help avoid this type of injury.
– Kids have a word for it when you land face-first: "fail." As an Internet meme, it's called faceplanting. But what really happens when people use their face for brakes? At BoingBoing, Maggie Koerth-Baker looks at the physical results—which aren't pretty—and takes a glimpse at the related field of injury biomechanics. She starts with a paper by a mechanical engineer about a classic faceplant: young man tries to ride bike along a board from shoreline to dock, misses board, lands face-first. (See the video here.) He endured Le Fort II and III fractures, his face cracking in a triangle shape starting at the top of the nose and going down both sides to the upper jaw. Sadly, other researchers say this particular video won't advance the field because the frame-rate is poor; real experiments analyze the 10-20 milliseconds in which injuries occur. So Koerth-Baker delves deeper into injury biomechanics, starting with John Stapp, an Air Force flight surgeon who endured a sudden stop in a rocket sled at 46.2 g's of force in 1954. He broke nearly all the capillaries in his eyes, Ejection Site reports, but his work helped the Air Force design pilot ejector-seats. More recently, studies on NFL concussions have shown that hits from the side or back cause more concussions than hits on the crown of the helmet. Which leaves faceplanters where, exactly? Well, getting seriously injured as we laugh and learn. At least this one, at SBNation, faceplanted on purpose in an effort to help his team. (Click to check out some less painful memes.)