Some returns end quickly, with the receiver kneeling in the end zone for a touchback. Others take a bit longer, ending with a tackle after a short gain. Still others last longer, with the receiver managing to streak past everyone on his way to a touchdown. Whichever way you go about it, the typical return doesn't last more than 20 seconds.
Then there's this return, from freshman Eric Bradley of Alma High School in Michigan:
Everyone involved must have been absolutely exhausted afterwards.