I remember Mrs. Johnson assigning (many times) a punishment to the entire class where you had to write out, in columns, math equations starting with 10,000 and then keep substracting 8.  That's 1,250 times!  It went on for pages and pages.  It was the most bizarre punishment ever, but I'll never forget it.  She'd assign it on a whim, whenever something ticked her off.  Wonder how she ever thought of that one?!