Ranch Dressing Swap
Next time you are eating at a buffett that has both ranch and blue cheese dressing just swap their signs around. Both dressings look very similar. Most people won't know til they get back to their seat and taste the difference.

Drinking Thru A Long Straw
Connect as many straws together as you can. Then sit a good distance from your victim. Have the person sitting next to him at the lunch table help you out. Have that person lift your long straw up and put it into the victim's milk when he or she isn't paying attention. Then drink it up from 2 tables across.

Box of Sheep Head
Find a butcher that will sell you a sheep head. Place it in a box along with napkins and plastic forks and place it on your victim's doorstep.

Cauliflower as Mashed Potatoes
Next time you are invited to a pot luck luncheon where everyone has to bring an item to eat, offer to bring mashed potatoes. Then instead of mashing potatoes, use cauliflower. They both look identical when served but they do not taste the same.

Microwave Ketchup Blast
Hide a couple of ketchup packets underneath the carousel inside the microwave. When your victim uses the microwave next, he will not know the packets are there and will have to clean up all the ketchup that explodes everywhere.

Body Builder Laxatives
If your victim is one of those body builder's in training then try this prank. Crush up some laxative pills and pour it into his powder drink mix. Then not only will he be getting ripped, but he will also be 'ripping' ...so to speak.

Wasabi Guacamole
Mix some wasabi into guacamole. It is the same color and is difficult to detect. People wont know the difference until they taste it.

Hot Butter
Tell your victim of a chemical reaction he may not be familiar with. Tell him salt mixed with butter creates heat. Then sprinkle some table salt on a square of butter. Tell your victim to feel the butter. As soon as he puts his and on the butter...smash his hand into the butter!

M&M Coke Prank
Right after your victim has just opened a bottle of coke, drop some M&M's inside his beverage when he isn't paying attention. This will cause his drink to keep on foaming.

Marmite Ice Cream Sunday
Prepare a beautiful ice cream sundae for you victim. But, instead of using chocolate syrup, replace that topping with marmite.