camera angles were used more prominently after the first week of play; the "Xcam" (as it was known in that league's broadcasts) remained in regular use throughout the rest of the season. ESPN first used Skycam in 2001 for an NFL pre-season telecast and then consistently in 2002 for Sunday Night Football broadcasts. Since then, ESPN and sister-network ABC have made widespread use of Skycam for NCAA football, Monday Night Football, and Super Bowl XXXVII. The networks have regularly offered a Skycam-only internet broadcast of many of its more important sportscasts under the Megacast brand. CBC used a CableCam in their broadcasts of the 2005 and 2006 Grey Cups. On October 22, 2017, NBC was required to broadcast the majority of a Sunday Night Football game using Skycam angles, as their traditional sideline angles were obscured by a large amount of fog. Reception to the impromptu experiment was mostly positive (with some drawing comparisons to the default camera angle used in football video games, such as the Madden NFL franchise); NBC announced that it would experiment with intentionally using the Skycam as a primary angle during a subsequent Thursday-night game on November 16, 2017 and again for the December 14 game the same year. The Skycam's perspective, while making more effective use of the field of vision offered by a television screen (thus allowing viewers to see plays develop more clearly than the traditional sideline view), distorts vertical distances and makes it more difficult to assess yardages, which was part of the reason it has not been used more often. Consequently, in NBC's trial runs, they switched to a traditional sideline camera in short-yardage situations including the red zone, where the shorter distances negate some of the disadvantages of the sideline camera. To mitigate some of these disadvantages, NBC experimented with expanding the live on-field graphics to include a "green zone" that darkens the area between the line of scrimmage and the line to gain for a first down. Other sports Prior to the 1984 Olympics in Los Angeles, it was proposed that Skycam be used at the Opening Ceremonies and Track & Field events at the LA Coliseum. During test runs, the images were excellent, but on its last test, one of its four support wires snagged on the top of the steel football goal post at the peristyle end of the Coliseum and bent one of the arms.