Luckily, as far as we're aware, there are yet to be any serious injuries caused from drones. But what happens when a drone either intentionally or not flies into you at full speed? It's not pretty.
Aalborg University conducted an experiment to see what happens to flesh when it comes into contact with a drone at full pelt. The research team aims to learn more about the dangers that drones can pose and how to improve on these aspects.
You do not want to get hit by one of these things.