There is tons of interesting things going on in Seattle these days. Here is one that HURTS.

[hcarvalhoalves]

Ok, why is he pressing a cinder block against a sledgehammer with his belly until it cracks?

[ddjchemist]

To release the energy in the oposite direction of the sledgehammer. It is similar to being punched in the belly. If you see it coming, you move your belly in the direction of the punch.

[daacon]

Because he can - street performers a hard living but usually very entertaining.