You are in company, and you start to suck your thumb...then, you lapse smoke, as if you are smoking a cigarette.
Sale prohibited to the minors. So you can recommence.
If you are an adept of cigarette's manipulation, you can include this humorous effect in your trick : thus gather invisible cigarettes in the air... and smoke it !
If you want to perform a trick with balls, some could appear in a cloud of smoke !
This device's application are unameable. And many can still be invented by your care ! easily realizable
Sale prohibited to the minors.