7. Lost in translation
An angle shooter whose native language is not English has a monster hand on the river. You make a bet. He counts chips for a call, but before he puts them into the pot, he says, “I raise. No! I mean call!” This is followed by an apology about getting confused over the English words. He knows that his “raise” will be taken as binding, and will reluctantly put in more chips. If you are suckered by this drama, you lose more than you otherwise would have.
Some may recall Ivan Freitaz employing this move at the European Poker Tour Grand Final in Madrid in 2011 (eventually won by Freitaz). Because he was a repeat offender, the tournament director was able to tell his opponent that he tended to do this when he had a very strong hand. But you may not be lucky enough to get that hint about how to interpret what happened.