This is an easy pool hustle that anyone can do, and relies on the fact that your mark thinks you couldn't make an easy shot, let alone a bank shot.
You set up two balls on the table, the cue ball on it's starting position. and another ball about a foot away. You bet your mark that you can hit the ball up the table, bank it off of the furthest wall, and back down the table into one of the extreme pockets.
You ask more one piece of help, the use of two cues.
The mark will think that this will only make it harder. In fact, it makes it almost impossible to miss. You set one of the cues on the table at an angle towards the pocket. A solid hit of the ball will bounce it off the back wall, and back down the table along the cue straight into the pocket.