Vegeta: That must suck. I'm either too busy working, or I get woken up for "emergencies", and or my crew wakes me, because I supposedly stop breathing in my sleep from time to time.
Goku: I think you should get that checked out...
Vegeta: I believe it's called sleep apnea. If not then I have yet another problem, other than that valve for my heart...
Goku: What?
Vegeta: Dysfunctional valve, had to get it replaced with a metal one. I blame stress.