Accelerated decrepitude

You know that something's gone wrong when you walk down Tottenham Court Road to pick up something ubernerdy from Maplin and end up blowing the budget in Muji instead.

(In my defence: Maplin didn't have the USB experimenter's kit I wanted, and the tiny keyring LED torch and matt-black wind-up wireless at Muji were to die for... but. If you see me in Ikea, kill me as swiftly and painlessly as you can. Painless is optional.)