I had a wrap party not too long ago and decided to give the cast and crew a laugh by screening a few bits of old stuff I'd shot that was frankly appaling.
When we screened it there were a few titters and people got the joke, but after a bit of time they started moving nervously in their chairs and a lot of them got that look in their eye, you know the one that says "What the hell am I doing working with this guy?".
We cut the screening short and I've never made the mistake again. I have a ton of stuff that will never see the light of day. God forbid anyone gets their hands on it. :o