When you're getting road head and come to the realization that it is so awful, you would rather sacrifice yourself and save the embarrassment of finishing. So you politely, yet firmly ask the giver to grab the wheel for a second. It is at this point whilst she grabs the wheel that you casually life the lock on the door and dive the fuck out.
Eric's car was stolen last night after he performed the fabled reverse tumbleweed. Afterwords he was rumored to have said it was a better fate.