To accidentally expose an object or part of an object

momentarily during a secret move.

For example, care must be taken not to "flash" a coin

palmed in your hand when performing your effect.

IMPROMPTU TRICK

An effect that can be performed at a moment's notice, usually with everyday objects that you can borrow, and little or no preparation.

The classic "coin from behind their ear" is a good example.

SILK

Magicians' jargon for "silk handkerchief".

Though most silks are actually made of 100% silk,

the phrase is sometimes used to describe any type of

ordinary cloth.

100% silk handkerchiefs are often used by magicians because

the cloths can be compressed down to a very tiny size,

making it easier to hide in the hand or inside equipment.

Silk also takes color very well, so the silks can be vibrant.