Yep, that is heart-attack causing when they do that stuff. My Yorkie onced jumped out of my arms in the front yard as he saw a small rodent like animal and he landed on hard concrete as I was standing out front in the driveway talking to a neighbor.

My heart stopped, I checked him out and fortunately after a very expensive visit and overnight stay at an ER animal hospital, he had just sprained a leg. Scared me to death

Glad your wee one is okay.