That left Demps in single coverage with Arizona alleverything receiver Larry Fitzgerald, who was streaking down the middle of the field.
The reality is that it Fitzgerald is almost impossible to cover anyway, and on a trick play like that he is impossible.
Still, the image of Demps stumbling and falling down as Fitzgerald hauled in the 62-yard touchdown pass will be a lasting one.
"It was a double pass," Eagles safety Quitin Mikell said in defense of his younger teammate. "Sometimes, in games like this, teams have to do that to spring players.
"We had guys in position. We just didn't make the play. This is a championship game. [Fitzgerald]is a great player and he's going to make plays, but when you get a double pass, it's really tough."
A bit more problematic for Demps was the silly penalty he got for unnecessary roughness late in the first half.
Arizona led 21-6 and was on its 16-yard line when Warner through a 5-yard completion to Anquan Boldin.
For some reason, Demps shoved Warner down well after the pass was thrown and did it right in front of an official.
Demps was flagged and the Cardinals got 15 additional yards moving the ball to the 36 with just under a 1 1/2 minutes left in the second quarter.
The drive ultimately ended with the Cardinals getting a 49-yard field goal from Neil Rackers as time expired.
Demps wasn't in the mood to explain what he was thinking.
"Nah, man, I'm sorry," he said when asked if he had moment to answer some questions. *