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For example when you hop on a trampoline sometimes you will be shocked before you even touch the tramp. Does the shock have to pass through the air to get to you or can it work in a vacuum?

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    $\begingroup$ May I invite you to close some of your 23 open questions :) $\endgroup$ – lemon Sep 20 '14 at 1:11
  • $\begingroup$ You can close questions?? Sorry I'm noob $\endgroup$ – Ray Kay Sep 20 '14 at 4:19
  • $\begingroup$ @RayKay: Lemon means that if you consider a question to be satisfactorily answered you should click on the tick symbol to accept the answer you like best. This flags the question as answered. $\endgroup$ – John Rennie Sep 20 '14 at 9:47
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Yes, electric discharge will also work in vacuum. Think of vacuum tubes.

However, you will not have the avalance effect of ionized gas like a spark.

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