This one is really tricky and you will need patience and accuracy of a Shaolin monk to succeed. Push the 8-ball next to you. It will follow the red line. Move quickly to the second 8-ball close to the yellow circle. When the moving 8-ball is going over the yellow X push the second 8-ball. It will go by the blue line. You have to find and hit a precise moment, so the second 8-ball falls down the hole exactly when the first one goes over it. If you push too early, first 8-ball will fall down too. If you push too late, second 8-ball will stop the first one. Be patience here. I succeeded on about 30th or 40th try. When you got the trickshot you have to help the moving ball to cross the second large pit. Move to the position marked by yellow circle. Wait until the ball goes over you and start to walk. 8-ball won't fall while you go under it. 8-ball can get over the pit on your head and it will break the cracked brick there and free the way to the gem.