That actually happened with a former coworker of mine, the clumsiest person I’ve ever met. (Me being the second one)
One of the bathrooms at the hotel we were staying at had a mirror covering the entire wall. Of course the clumsy guy tried to walk into the mirror, bashing his face. It was hilarious!
I heard they are always trembling because they are too small to retain their body heat. And they are aggressive because everyone else is too big and scary.
These poor dogs literally spend most of their lives cold and terrified.