I've had 2 expereinces, neither of which involved a trailer:
I was making a left turn into heavy traffic, accelerating heavily when I realized the car that I was pulling behind had stopped and i was about to hit him in the rear. I pulled into the berm and stop about half a car length further than the stopped car. The car I pulled in front of didn't react strongly enough and hit that stopped car. Luckily, the light turned green and I left the scene.
Another was when the clutch cable broke when I went to leave a rest area. I was about an hour's drive from home and managed to get all the way home without having to stop - all the time shifting without the clutch.
