OMG TC!! Sounds like your kitties may have had a few of their friends over! LOL Actually, I would just keep an eye on them for anything out of the ordinarary. I'm sure they are fine, if not a bit startled from knocking that tree over! If they look like normal, then they're probably ok. Cats are pretty quick to respond to situations (usually) and more than likely avoided having something fall on them, if that's what you're worried about. **hugs** Might have to glue that tree to the floor...or tell your furkids not to have their friends over while you're not home LOL