Colossus falls down

I own a lot of action figures, mostly related to comic books. I used to display them all at once on every available shelf space in my apartment, but eventually it got to be too much to keep up with, so now I just display a few and every once in a while I rotate them out and display a few others.

A few weeks ago I removed a large, heavy figure of Colossus from the back room and set him up on top of one of the bookcases, but every few days I come home to this:



That's not a bookcase. That's the floor. He doesn't always land the same way, but he keeps toppling from his perch, and I'm starting to think I might need to move him. In the meantime, though, I just keep standing him back up, and when I did it today after I got home from the grocery store I suddenly felt like taking pictures.



He doesn't look like he should fall down, right?

Jean Grey doesn't fall down:



Ozymandias doesn't fall down:



Starman doesn't fall down:



The Human Torch doesn't fall down:



Aquaman doesn't fall down:



but he does get this, "Get that camera out of my face!" look if you catch him in dim light:



Colossus, though... he falls down.

Maybe he just doesn't like heights.