"This is going to be a first down," he thought when the ball left his hand.
Instead, Curtis Brown broke on the ball, stepping in front of Fooks and intercepting the ball.
He returned it 77 yards for a touchdown.
"The guy just made a great play," Robinson said. "It seemed like they were all over just about everything we had. There were probably times that I should've just taken it and tucked and ran or something."
That became more and more difficult to do the deeper the hole the Cowboys dug for themselves. When they found themselves down 20 points early in the second half, they had to throw the ball.
That only compounded the Cowboys' woes and Robinson's struggles.
"As a quarterback, you start thinking that you need to get it back," he said. "You do start pressing a little bit when you get down like that. You start forcing things."
Robinson and the Cowboys didn't expect to be in such dire straits against the Longhorns.
The way he was playing heading into the game, he had a chance to put his team in a BCS bowl and himself in the Heisman Trophy race. Had Robinson led the Cowboys to an upset of the Longhorns, all sorts of glory would've been within reach.
Like so many things Saturday night, that didn't go as planned for Robinson.
"As a college football player, everyone has bad games," Cowboy tailback Keith Toston said. "Unfortunately, one of his bad games was on a big stage."