The Management here takes the reasonable line that, without Gestures, most people would not know that Magic was being done. So all wizards wave their arms about a lot. Many Gesture with their staffs. Some flick their fingers. In extreme cases, the Gesture leaves a green glowing trace in the air.
http://tvtropes.org/pmwiki/pmwiki.php/Quotes/MagicalGesture
FollowingQuotes / Magical Gesture
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