Here is a shot that has been discussed over in the DCC forum, but I thought it ought to get wider coverage. It is one of those shots that goes beyond really, really hard into the realm of impossibility.

The shot is played with a level cue stick and maximum outside english (left in the picture). The cushion has not been doctored, and the object ball is entirely on the flat part of the cushion as shown -- not partly on the point of the side pocket.
How many tries would you give up for an even money bet?
Before you answer, look at the shot on a table and try it a few times. It looks much harder in person.

The shot is played with a level cue stick and maximum outside english (left in the picture). The cushion has not been doctored, and the object ball is entirely on the flat part of the cushion as shown -- not partly on the point of the side pocket.
How many tries would you give up for an even money bet?
Before you answer, look at the shot on a table and try it a few times. It looks much harder in person.