Had it happen once w/a platinum teen, but either shortly before or after that, I nearly killed his mother in the same unit (she was green and, frankly, had it coming). She fell out in the usual form. I'm pretty sure I had a different sim in gold asp. use the same unit w/no problems as well.
So I sent that sim to a comm. lot and my game crashed and puter rebooted but that's a whole other deal.
Edit: had it happen 2 more times, 2 different sims, same unit. Each sim only had 2 or 3 low motives.