You captchalogue the CARTOON BOMB. Its card is now PRIMED. Later, if you want to retrieve it, you will have to complete the DIFFUSE SEQUENCE to successfully retrieve the item without detonating the card. In this case, this would detonate the CARTOON BOMB as well, setting off a chain reaction of SLAPSTICK EXPLOSIONS. This methodology applies for all items captchalogued by this modus, not just literal bombs.
It goes without saying that this causes problems.