I came across this video and wondered how often the boom mic is in shot. I was thinking we could start a thread for examples.
Moscow Heat (2004) there was a boom that doesn't just graze the top of the frame, it dips in like the sound guy slipped. The movie was hilariously bad up to that point, so that just made us roll with laughter even more.
On a related note, during the "I'm porn dialog without any sex" movie Wild Man (1989), there is an awesome scene where someone takes a dive off of a balcony and you see someone toss a mattress across the frame for them to land on. I believe there were some booms in that movie too.
I'm surprised when I see booms or crew in the shot in movies made even in the past few years.. it's just not that hard, even for an amateur, to mask it out.