Dropped watch

[Otis]

Yes, I've finally done it... I've dropped a watch.

The seamaster, it happened while putting in on my wrist, and it just.. somehow... slipped off and fell pretty much flat on it's caseback.... onto the kitchen tiles.

Cosmetically it's OK, there's some minor dents on the underside of the 2 lugs.
It still runs fine, and there's no abnormal 'sproing' I can hear but I'm a little concerned nonetheless.

So, let's hear from those that have dropped theirs. From what is supposedly a tough, shock-resistant sports watch, what sort of damage could occur?
I should get it checked out, I know. Shame it's not under warranty anymore