You're wrong. Check out this link:
http://i35.photobucket.com/albums/d186/HoodRiverDude/Seahawks/RothTD.jpg
Actually your link shows the same thing, the ball just crossing the line. You are ASSUMING those two photos are of the same INSTANT -- they are not. The first photo clearly shows the defneder and Roth seperated. RIth went forward another few inches and so did the defender. They then hit shoulder to shoulder -- an action which caused Rothlesbergers arm to swing slightly forward and also to open up -- allowing as both your link and this picture show, a clear few of the ball about 1-2 inches over the goal line.
Physics are a wonderful thing. Thank you for playing.
