Troy Aikman's concussion in the third quarter of the 1994 NFC Championship game against the San Francisco 49ers is now just a footnote on the team's march to a second consecutive Super Bowl victory, which itself gets lost in telling of the mid-'90s golden age of America's Team.

Aikman's injury gets more prominent billing in League of Denial, the much-anticipated Frontline documentary probing the concussion crisis in the NFL. The film doesn't premiere until next Tuesday, but Frontline today unveiled a two-minute teaser featuring the Aikman story, as told by his agent, Leigh Steinberg.

The concussion itself was caused by a flying knee from 49ers defensive end Dennis Brown. Aikman was pulled from the game, replaced by backup Bernie Kosar and taken to a local hospital. Steinberg found him there, sitting in bed in a darkened room. The agent recalled: