Luke Mockridge is a german YouTuber / Comedian, and whilst he did a (quite exquisite!) fake sneeze prank before, I found a real sneeze today.
He and his "co-star" Joyce tested out a demonstration situation against the police, and these are the Outtakes. They were sitting in a room and the police let in some teargas. While they were coughing and gagging (it doesn't contain any vomiting, in case you are worried 
), but it obviously made Luke sneeze, too. His giggling afterwards is so cute!
Enjoy! (Oh, and there is some nose blowing, too!)