Never throw the dice when there's a guy on the other end of the table with a string of chicken feet around his neck and he's drawing out circles and strange symbols on the felt with his finger. Unless you've got some way to cross-mojo him.
We had an honest to god "cooler" hit our craps table in Vegas back in October of '13 or so.
The guy was head to toe windbreaker-style. He was positioned between our table and another and was taking turns rotating between them. Like clockwork, if our shooter started to hit a couple of points, windbreaker guy would turn to our table and drop $50 on the pass line and immediately lose it. Then he'd turn to the other table for similar results.
After he did that twice (he was positioned immediately to my left, so I had a good view of his antics), I told the dealer closest to me to take my bets off when he dropped his chips on our table. Shooter crapped out. I mention this trend to my 3 buddies and they all follow suit on his next visit to our table. Table craps out...our chips are scattered across the board, but are "off."
Dealer looked at me, winked and said that it might be a good time to take a break and grab some lunch.