If you really want to test someone's fight or flight response you can't really moan if they decide to stand and bang rather than run off. It's not just people dressed as clowns, if people get any kind of scare they'll either lash out at it or leg it. Like the video where that dude pops up from a wheely bin and gets a smack in the mouth after a lot of other people just moved away. It's the chance the 'clowns' take I guess? But they seriously can't moan having put themselves in the situation to begin with.
Yeah, agreed to an extent. If someone just jumps out at you when you're minding your own business then if your automatic reaction is to fight then unlucky them.

If you're purposely going out to start on a clown then thats a different matter.
It all reminds me of the time a housemate of mine jumped out of a door at me with a cricket bat (for a joke). I only managed to stop the automatic reaction when the cricket bat was halfway towards his head... Needless to say he didn't do it again.
