Effet :
Two audience members are offered an experience on stage... Both are sat on a chair, a few feet apart, on each side of the stage. They are blindfolded. You ask them to raise their hand every time they feel poked. You poke the first person, whose arm will raise, then you poke the second assistant whose arm will raise as well. Now, it's time for you to try a unique psychic experience, telepathy via touching. When you touch the first assistant, the second one will raise their arm at the exact same moment. Both assistants will feel poked when you actually only touched one. Strange...

There are many other uses for this device, such as asking an audience member for a number then pass it on to the a second audience member blindfolded and standing several feet away on the stage, only by telepathy.