In all feats of fire-eating ...

In all feats of fire-eating it should be noted that the head is thrown well back, so that the flame may pass out of the open mouth instead of up into the roof, as it would if the head were held naturally.
 Harry Houdini

Quotes from the same author

Magic is the sole science not accepted by scientists, because they can't understand it.
 Harry Houdini
My chief task has been to conquer fear. The public sees only the thrill of the accomplished trick; they have no conception of the tortuous preliminary self-training that was necessary to conquer fear.
 Harry Houdini
Flames from the lips may be produced by holding in the mouth a sponge saturated with the purest gasoline.
 Harry Houdini
I am not an irretrievable skeptic. I am not hopelessly prejudiced. I am perfectly willing to believe, and my mind is wide open; but I have, as yet, to be convinced. I am perfectly willing, but the evidence must be sane and conclusive.
 Harry Houdini
My Brain is the key that sets me free.
 Harry Houdini