I need more pictures, to understand what I'm looking at.
Okay, I'll try to take some more later today.
It looks as if that pic is taken through the grass discharge chute, toward the blade.
Yes, i was holding up the grass discharge chute with my other hand.
a single one-piece blade ("ninja blade"), and its length is the full cutting-width of the mower.
No, there are two blades, on each side of the mower. The left hand side blade is fine, still connected to the deck. The right side blade is pictured.
The blade appears to be mounted on a shaft which goes up and through the deck. On the left side, the shaft is attached to the deck at the point where it enters through it. On the right side, it's no longer attached and it looks like it has sheared off.
The belt is not damaged, just off.