when you can't resist adding a 12 pack of sharpies to your work stationary order - mine have just arrived
You find bits of soggy playing card all over your freshly washed clothes
you buy all sorts of random things off of ebay in an attempt to find the perfect final load for the cups and balls routine
You could re-create the passing of Haleys comet with the amount of flash paper and wool you have in the house
After removing the top from a bottle of beer you can't help classic palming the cap and doing a few false transfers - even when you are alone.
After your wife drops a glove on the coast path you go back to find it, but pretend to have not found it, then later produce it as the final load in the cups and balls routine...