I hear that getting a vintage piano (preferably someone's pride and joy), stuffing it with paper, dousing it in petrol and then setting fire to it is always good for a laugh.
Two words of warning:
1) Make sure it's sourced privately. You don't want a £10000 share of 'piano tax' to appear on your mess bill after you've just burnt the mess's 19th Century antique grand piano.
2) Don't remove the O.C.'s rank slides and throw them in the blaze as some sort of sacrifice to the 'Lift Pixies' unless you particularly like wearing your hat.