Busted in Biology
Back in 4th form, I took advantage of my seating position at the back of the biology lab to scratch a caricature of my biology teacher E.J. on the side of the wooden desk, which turned out rather well, I thought at the time. Schoolboy error, I forgot that he passed by that desk on his way to and from his office at the end of the lab, and he only took four classes, of which only two were large enough to have students sitting where I sat.

So, at the next biology class, I was confronted with the indisputable evidence, issued with a square of sandpaper and told to remove my artwork in the afternoon. I was then renamed 'Leonardo' for the next two and a half years of my time in his class. Every time I entered the lab and saw the lighter wood square where I had sanded off my masterpiece, I smiled.

Postscript: I saw my old biology teacher a couple of years back, some fifteen years after I had left school, and he still greeted me as Leonardo.
(madoda, Sun 10 Oct 2010, 15:54, Reply)