What nonsensical threats are made in your family, either by you, or do you remember hearing them as a child?
Some of mine were or are:
...or you'll find yourself in deep water. Hot.
If you sit too near the fire, you'll get your feet burnt off, like Pinocchio.
I'll get a cane. (Said after reading Roald Dahl)
If you put stones down that drain cover, the troll that lives underneath will climb up, lift off the lid, and eat you up.
Don't press any buttons, one of them is the self-destruct button.
Which ones do you use, or remember? This is a LIGHT HEARTED thread: anyone who replies with "you must never make threats you don't intend to follow through" will be sent to the toilet, which is terrible because it's not the one in your own house, and contains... wait for it... a loo brush! 