When my parents are asleep, I'm going to jump on the bed repeatedly.
That sounds really rude. Why jump on the bed when they are asleep?
I want to surprise them at night.
Waking up your parents in this manner is rude. You should let them sleep and wake up on their own time.
I hate when they are asleep. This is the only thing I could do to them.
They work hard and need their sleep too. Just let them sleep nothing is so important that it can't wait until the morning.