Rex Ignis - Impossible Heat Control by ParaLabs

Imagine this: You step up to a table in a restaurant. You take the restaurant's candle and place it in front of you. You tell your viewers that it is possible for you to focus your mental energi enough that you do not feel the heat of a flame, thus making your hand impervious to fire. To demonstrate this, you first ask a spectator to hold his hand over the candle flame and feel the heat of the fire. After he has convinced himself that it is indeed a real candle with a real flame, have your hands checked. (You have nothing to hide)

You pause for a short moment, focusing your thoughts and slowly place your hand directly over the candle flame at a height and length of time that would certainly burn and char flesh. You remove your hand from the candle and show your spectators your hand is unharmed.

Now you ask your participant to focus his/her thoughts as well. Ask him to imagine that he too can control his feelings; that he will not be burned by the candle flame. For example, he could imagine a thick layer of ice covers his hand. When he is ready, take his hand and hold it for a moment directly over the flame. He will actually feel nothing! However, you can control the moment when his focus is broken and the heat returns. At the snap of your fingers, the heat becomes unbearable and the spectator will have to pull his hand away from the flame.

Blow out the candle and if you wish, give it to your spectator as a souvenir.