I felt like I didn't push myself hard enough with this morning's workout, so I booked an evening ShadowBox class. As I was going to class I felt like I had made a really dumb decision because I just wanted to go to bed. But, man, I killed it. Pushups, you say? How about explosive plyometric pushups! You asked for jump squats? You're getting 180 degree jump squats through the roof! (I still can't get through his ab routine at the end without stopping, though.)