Btw here's a video of Lance Briggs laying the shoulder and standing over top.
http://youtu.be/a0l-r_HVM6k
But look at the context. LB ready and waiting for a WR running right into him. He used the WRs momentum more than his own and planted his feet and shoulder charged him. This would NEVER happen if a ball carrier was actually looking at Briggs and already had the ball because he obviously wouldn't run direction into a waiting LB. CJ was running his route though and got laid out. This should happen when people start abusing slants, LBs should cheat out and lay WRs out like this.