Any know the spider web hand trick?

i remember you hold a person's hand and make it relax by rubbing it until no circulation, Then I believe you pinch the middle, and touch the persons fingertips? I'm not sure exactly, I can't find anywhere how to do it...
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+1 y
"where you cut off the circulation and then you pinch the middle of the hand and pull up, it feels like a spiderweb comes out of it "


I'm am getting descriptions from online... I would like to know more about it though
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+1 y
"thats an old trick we used to do in school

what you do is clinch your hand for a long time 5 min or so

when it gets kinda numb, open it very slowly, trying not to wake it up

and have someone pinch it in the center and slowly pull away

itll feel like theyre pulling something out of your hand"
Any know the spider web hand trick?
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