I have been the target of a surprised vulture's vomit while being completely unaware of its presence in the tree above me. That was one of the most miserable experiences I've ever had. I look up much more often now.
The turkey vulture is also one of, if not the most graceful flying animal.
It's neat to see the sheer majesty that nature is capable of on soaring display - and then sometimes get to contrast that with how hideous they look up close.