So unfunny I don't even want it.

Year 8, French field trip, one of the funniest moments of my life.
Instead of educating us of the wonders of French culture, we were often driven into a French town and dumped there for a couple of hours. The French, being French never actually opened any of their shops so we often wandered about giggling at the condom machines scattered around the centre. That was until an industrious pupil found a joke shop (the kind that isn't there when you go back, only a unexplained draught and a cackle of laughter); so, 10 minutes later loaded with bangers and stink bombs we descended on the centre once more.
A group of us were walking down a street when we noticed another group of pupils further down the street. "Wouldn't it be fantastic if we chucked a stink bomb at them?", the thought seemed to arrive in our heads simultaneously. So we gathered round. One of the small glass vials of yellow stench was unsheathed, and it was held purposefully, catching the sun and shimmering with menace. The kid drew back and let rip, and we all followed the path of the bomb, which to our horror and suprise, was anything but straight or true; it veered horribly to the left and collided with the forehead of a French woman laden with heavy shopping. As it made contact it sheared in two, both halves heading off in opposite directions. The yellow liquid dribbled down her forehead and she stopped dead, dropped her shopping, brought one hand to her head, and pointed straight at the perpertrator. Then she unleashed a foray of indecipherable French (bodysnatcher style), but all the kid could mutter was "Sorry Lady" before the chase ensued. They both sprinted off down the street, her shopping abandoned, whilst the rest of us pissed ourselves.