Wagner did conditioning, and he inspired me as a coach and a player.
He had this drill where we would jump over yard markers, and at first I wasn't fast enough for him. That enraged me so much I purchased a yard marker and did the drill independently in my back yard until I was fast enough to beat the other linemen in the drill.
When I coached, I did a modified version of the drill- we used tackling dummies instead, and I did it with my players.