This was one of my favourite jokes when I was about 8 (and actually remains one of my favourite jokes):
What's green, hairy and very dangerous?
A horde of stampeding gooseberries.
Why, exactly, is this funny? I wish I knew. Is it the anthropomorphisation (I think I may have made that word up) of the fruit? Is it the hairiness? The danger? Is it the visual of a horde of gooseberries stampeding down a cliff? Or is it the fact that gooseberries are by their very nature peaceable fruits, so pretending they are otherwise is hilarious? Makes me smile every time though...
ON EDIT: Some googling showed up The Dangerous Brothers and the origin of the gooseberry jokes. You learn something new every day.