He got up and made sad little wheeky crying noises, if guinea pigs can cry that's what it'd sound like I think. I had no idea what to do, it was the most pathetic sound I've ever heard. Then he went into his house and didn't really do much. I kept checking on him.
I try to remind myself that he once jumped from a full-speed run face-first into his cage, and just shook it off, so he must be kind of sturdy. I put some hay out later and he ran out to eat with the roommates, and he's on top of his house now like he usually is, so I think he'll survive. I just feel bad.
(Plus some little voice in the back of my head keeps asking what would happen if I had a human baby someday, and she bites me and I drop her on her face. Is that weird?)