Sitting at a table, up 40 units, every one at the table is having fun and enjoying themselves and on a bit of winning streak. Then, an obnoxious couple sits down to play, with obvious domestic problems, and just sucks the
energy out of the table, and everyone starts to begin losing. The couple's cursing, bickering with each other, etc., really f***ing annoying.
Soon the other ploppies have the "common sense" to leave. I on the other hand as the know it all AP decide to stick around, despite the fact I wasn't feeling to good about the thought of playing with these losers. I did initially think to myself "hmm, getting kind of late in my session. These two are idiots, I can't envision them leaving the table winning (and of course there is some correlation between how well the ploppies do and how well I do). They seem like complete losers".
Of course, as soon as they sat down, my +40 units steadily evaporated, and I left down 10 units, it was uncanny. Ah, should have just trusted my ploppy instincts

The ploppies were smart enough to leave. On the other hand, maybe not so ploppyish, maybe I did lose my "enthusiasm" and edge when they sit down. Wish I did leave when I didn't feel right