Shadow
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A trick where the pen spins on the back side of some fingers, usually while palm down. It can either go up some fingers or go down slots.
During a shadow, as defined by the NC, the push and catch are the same as in a sonic, 0.5 revolutions each. The spin in the middle has to have at least 0.5 revolutions. Thus, one possible breakdown is:
shadow 23-12 = (PD) charge 0.5 23 ~ spin 2b ~ charge 0.5 12
History
The trick was discovered by Hideaki Kondo in 2001, who called it シングルアクセルソニック (single axel sonic), with single axel being the modifier he used for 1.5 revolutions. In 2002, kangandgeon published on his website the first video of this trick starting and finishing in the same slots, and coined the terms shadow[1] and shadow still. For the next few years, in UPSB v2, both tricks were considered different:
“It’s a Shadow if the pen stays in the same slot (23-23) or moves down the hand (23-34). Sonic 1.5 moves up the hand (23-12).”[2]
In October 2006, the Naming Committee published an article in the UPSB wiki unifying both concepts, which is how we understand them today.
“There is no longer a single direction specified that a Shadow must follow. Shadows Normal and Shadows Reverse can each now travel up the hand, down the hand or stay in the same place.” [3]
In Japan, the name single axel sonic has fallen out of favor, with the direct translation シャドウ (shadow) being preferred by most spinners. In 2003, sula_la showed on his page a shadow 12-T1, which he called 飛龍在天 (The Dragon Soars in the Sky). Another name from Hong Kong, albeit more recent, is script spin, which is sometimes used to describe a shadow 12-12 executed palm up, with bent fingers.
Variation
Inverse Shadow
During an inverse shadow, the pen spins over the palm side of the fingers, with the hand in palm up position. Just like in a shadow, the pen can travel up, stay still or go down slots.
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