They cross their arms since they also don't know what to do with them.

or a bow

oh no not a 4 legged, hooved, larger utahraptor does the horse part have fur and the raptor part have feathers or does one of them just take over the other?

Where'd they get the coconuts?

But we move our hands for balance as we run, 4 legged animals don't need that. Also how would they time it with the movement of the legs?

Ah nonono, thats just their sense of fashion. Both are actually made out of cardboard and they take great pride in the intricate ways that they paint them.

"HMS Centaur, coming through!"

I think, canonically, they're always going to rape someone.

they actually just bend down and use the human arms to help walk (more legs = faster, since less time without touching ground, more time propelling themselves forward)

or a bow

They cross their arms since they also don't know what to do with them.

*"Humans can't run, what would they do with their arms?"*

Human legs and horse legs are very different