Phrases from the distant past

When I was young, very many years ago, my mum used to take me with her shopping and visiting people. If I misbehaved, or behaved less than perfectly, she had two phrases that compelled instant obedience.
The first was:
"Wait till I get you home!"
The second:
"I'll deal with you later."
These phrases could be combined into a single, chilling sentence:
"I'll deal with you when we get home."
Any one of these was sufficient to create an impeccably behaved child or youth in the hope that mum would forget the earlier misdemeanours and remember only the perfect daughter of the latter part of her trip!