Lyon didn't see the gun. The man spoke briefly to a woman next to him – and she glared at him.
Then the man walked away – nonchalantly, it seemed to Lyon. Lyon assumed that the man was going to a bathroom to check his wound but didn't see him return. The woman followed the man as he ambled off. He left a thinning trail of blood.
A 37-year-old man concealed a .380-caliber handgun in his sock as he went into Hillier Stadium. The gun, in his sock, became uncomfortable. As he tried to adjust his sock, the gun fired, hitting him in the foot.
The bullet ricocheted about 50 feet and hit a 28-year-old woman in her leg as she sat under the media box. Police called it an accidental shooting but noted that the stadium entrance has a "no-gun" sign.
Butler County Attorney Darrin Devinney said Thursday that he is waiting on the investigation to be completed before deciding whether to file charges.
Under changes made by Kansas legislators, people can carry concealed weapons, no permit required, in most public places.
On Thursday, Lyon recalled that the gun fired around 2 p.m., at the beginning of the ceremonies. The graduates had yet to take their seats.
Lyon said he was there to see his best friend's daughter graduate, arrived late and had to stand in a spot near the fence behind the main crowd.
At first after the gunshot, he said, "Nobody really knew what was going on." Someone said they thought it was firecracker.
Police said that not many people in the crowd, estimated to number 500 to 1,000, heard the shot.
Lyon saw a man calling on a cellphone and saying that someone had fired a gun. But people seemed calm.
Lyon didn't realize the bullet had ricocheted, striking the woman, until an ambulance arrived.
In the moments after hearing the shot and realizing what had happened, Lyon recalled thinking to himself: "Jesus, dude, you're at a graduation," so why bring a gun?
Lyon, who is listed as a witness in a police report about the incident, told an officer that he was near the gun when it discharged, and the officer gave him a form to fill out.
Lyon said he openly carries a .45-caliber handgun in a holster and only when he rides his prized motorcycle.
For safety, he said, he never keeps a round in the chamber.
He wasn't armed when he was at the graduation, he said.
His experience at the stadium is "something that everybody needs to consider when they are carrying a gun," Lyon said.
The man who shot himself in the foot "was real lucky that (ricocheting) bullet hit the lady in the leg" and not others in the back, causing a more serious injury, Lyon said.