The idea is simple. You have a wallet filled with packs of custard. When accosted, you simply pull out the wallet and press the hidden switch. After a short time delay (four seconds or so), a very small explosive charge is detonated. The custard packets rupture, and the wallet oozes custard on your attacker.
The mugger is now befuddled (and possibly hungry), and will most likely scurry off to eat his or her newfound leathery custard under a shrubbery of shame and guilt.-- justaguy, May 17 2005 DisguisoWallet DisguisioWalletFine, I edited it [justaguy, May 17 2005] I could see both attacker and victim enjoying the custard in unison, followed by a short song about the days of old, beautiful women and God's will for man.-- daseva, May 17 2005 I've seen musical greeting cards... It shouldn't be that difficult to make the wallet play an upbeat tune.-- justaguy, May 17 2005 random, halfbakery