When do you press stop?

Everyone has a stopping point. You know, you are watching a film that you don't like and a decision must be reached. Pick a reason--it's boring, the acting is terrible, it's annoying, it's just not any good. You pick up the remote and press stop. You then move onto something else in your life. My question for you is this: what was the final moment or the last film you were watching when you had enough and went over the edge to the stopping point?

I had such a moment recently. I was watching the 1975 cult French film The Beast (La Bete) and right off the bat there is a very graphic scene of horse on horse copulation. I'm talking erection, quivering and ejaculation graphic. Horses. For a minute or two. I think to myself--"Okay, it is French, it's a controversial film in some circles, an extended horse sex scene in the first three minutes, while not my thing, it's understandable." I keep watching.

About ten minutes later there is a second scene of two horses getting it on! That was my moment of remembering of the other things I could be doing--I pressed stop. I don't feel guilty at all. I just won't watch The Beast and who knows how many more sex scenes the kinky, equine obsessed director might have put in the movie.

Evidently I have a stopping point: multiple + detailed lovemaking scenes between horses. But that's just me--what is your stopping point or what was the last film you stopped watching and never returned to?