That's not concrete.
Look how easily the assistant picks up one half after the stunt. Grey coloued plaster maybe.

Man. Plaster? Did you see the way his hand took the impact. God damn I hate fools.

I definitely wouldn't want him to chop my block off

That's a standard concrete block used for building central internal walls, etc. breeze blocks are far coarser and would crumble, plaster is generally smoother and a lot harder.
The one thing you can say about the Brainiac show Is that they use the proper stuff

Yeah, I'm sorry but the Brainiac Boys don't use cheap imitation shit.

I like fools. they make me laugh.

Fools make me want to shake babies, not really, just a thought.

it's called having strength , oh but that's something you wouldn't know