He figured out that popping works best with a quick jump on the bubble, but he had a hard time popping the bubbles with his hands? Why?
1. He gets all of his weight (and then some - biomechanics, yay!) on the bubble.
2. The time he exerts the force is short.
With his hands:
1. Not all of his weight is transferred to the bubble (ie, he's not doing a handstand on it). Some of his weight remains on the ground while his legs hold him up.
2. The time he exerts the force is a lot longer when he uses his hands (the bubble takes time to deforms before it pops).
What simple science experiments have you done this week?