Hip thrusts

i just started doing this recently. they seem to work great. start off with light weight until you get used to it. im going to attach a video so you have a visual of how to do it, but basically all you need to do is get a bench and lean your elbows and forearms on it then put a bar on your hips and in essence hump the air. this will greatly help with primarily d-linemen but its great on the o-line too. the thrusting motion simulates a d-line player firing out of his stance and hitting his man it gets you that power that dwight freeney showed everyone last night in the superbowl when he dominted the saints tackle to get the sack while hurt. this exercise forces the exaggeration of rolling through with your whole body when getting out of your stance or while form tackling.http://www.youtube.com/watch?v=jVlQhlKf-5Q