It's all in the dialouge --->

"That things' gotta be fake!"

Fredo:
That ain't no fake, that's real. That's why they call him Superman.

Geary:
Hey, Freddie, Freddie, where did you find this place?

Fredo (boisterously):
Johnny Ola told me about this place. He brought me here. I didn't believe him, but seein' is believin', huh?...Old man Roth'd never come here, but old Johnny knows these places like the back of his hand. Now watch him, he's gonna break the cracker with it.

Geary:
Break a cracker! I want to see him break a brick. He could knock down a building.