What was your parents' direst threat?

Okay, so it tends to be a version of " Just wait 'til I get you home."

But what was the variation in your house ?

In our house, it was:

1) " If I have to come up those stairs and I tell ye, there'll be wigs on the green"

2) "For two pins now, and I'll turn this car around, and nobody will be going anywhere."

and

3) *looks for copywrite symbol*

"I'll reach back there now in a minute and I don't care who I hit"*

*done while raising a finger off the steering wheel to salute the oncoming driver, and lighting a Players No.6*

So AHers. What were your parents' favourite threats?