[Physicist]

Here's what I want to know: when the Giants intercepted that last 2-point conversion, why did the whistle blow? In college football that's a returnable ball; is it different in the NFL? Those two points could perhaps have won it for the Giants.

[Hatteras]

According to the NFL rules, the play is dead on an extra point conversion the moment the defense takes control of the ball or it leaves the field of play.

[discostu]

In the NFL extra points are not "live balls", for most purposes opposing players are considered to be part of the ground, and once that ball wasn't caught by a Niner the play was over. One of the rules I'd like to see changed.