Watch this video, beginning at the 54 second mark:
Now imagine for a second that you are the one who walked into that convenience store, saw what appeared to be a dead body, and were then confronted with a man wearing a clown costume, covered in blood and carrying a bloody axe, who then chased you through that store into the corner.
You can look at this video:
Now imagine that you are in this convenience store and are faced with a person who is obviously, to you, an armed robber.
Would you draw and fire? I know I would, and you know what? I would be completely justified in doing so. You are presenting me with a situation where I am in reasonable fear of my life, where I reasonably believe that I am facing an imminent forcible felony. After all, you are after the fear reaction from your victims in order to obtain a few laughs.
In fact, since the people making this video have not secured a release from the "victims" of their prank in advance, I submit that they are committing a crime. A felony, in fact. Several of them. The European prankster filmmakers think that putting people in mortal fear for their lives is funny.
This is a warning to you idiots: pull a prank like that in a concealed carry state, and you are likely to be shot, and the shooter will be blameless. The members of the film crew who survive will be charged with murder for the death of their accomplice.
There are people who will claim that shooting them would be morally wrong, because it is a prank and no one was harmed. I say to you: bullshit. People are not put on this earth to be your playthings, you sadistic pieces of trash.