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The crazy kid at school
Every school had one, no?
Our nutcase got up to various madness, including taking a full poop on the roof of the headmasters Jaguar, setting fire to anything flammable (including some girls hair) and general masturbation craziness - aka he would just wank wherever/whenever and not give 2 hoots
Kid got many, many chances, but finally got the boot in year 2 for attacking a class of young'uns with a fire extinguisher (water, not foam)
Other examples welcome..