This one is done while anchor fishing and requires a plastic 2 litre pop bottle and a snoring fishing partner.

Fill the pop bottle about 3/4 full with water, put the lid on, and tie about 2 feet of fishing line to the neck of the bottle. Then tie a snap swivel on the other end and snap it to your buddies line. Let it slide all the way down to his spreader. Veeerrryy fishy looking, especially when you're yelling at him - WAKE UP YOU GOT A FISH ON!!

You can add to his pleasure by putting the p iss bucket, cooler and other obstacles in his way so he trips over them while trying to get to his pole in his half awake stupor.