When I was a kid there was this guy in my class who was a bit slow. Anyway, one day we were learning fractions in maths (we would have been in maybe 3rd/4th/5th class, can't remember

) and the teacher asked him a question.
It was the really easy stuff, the question was something like "what's 1/4 + 1/4". He didn't have a clue, all I remember was the complete confusion on his face as he attempted to comprehend such a difficult question. :pac: I saw my opportunity, the chance to break away from the boredom of math and make everyone laugh.
I turned my head in his direction and whispered "One hundred". He nodded in appreciation and confidently replied to the teacher's question. Everyone began laughing at him, even the teacher was smiling. I'll never forget the look in his eyes the moment he realised I had fooled him.
Not the worst thing to have done and I probably did meaner things. Anyway, what mean things did you do as a young kid?