In fact, I bet they'd scream in agony and claw at their forehead while writhing spasmodically on the ground, their howls echoing around the room.
I'll have to dare someone stupid to do it.
* - A lot of wasabi that you get is actually just powdered wasabi mixed with water to form a paste. My dad's got a can at home. I don't use wasabi as often at home so I just keep a tube of the paste in the fridge, and because at the time, that was all the store had. So wasabi powder is wasabi, minus the liquid content. Mmm mmm good. That'd make a HELL of a powdered donut.