Xkcd (angular momentum problem)

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SUMMARY

The discussion centers on the concept of angular momentum as presented in the xkcd comic regarding the effects of human movement on Earth's rotation. It concludes that when a person runs in a counterclockwise direction in the northern hemisphere, they do indeed exert a force that momentarily affects Earth's angular momentum. However, this effect is negligible and adheres to the principle of conservation of momentum, as the system's total angular momentum remains constant.

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blackwing1
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I was reading xkcd and wondering if spinning in a counterclockwise way (on the northern hemisphere) would actually steal some of Earth's angular momentum and slow it down a bit. Is it possible or does this violate conservation of momentum?
 
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The angular momentum of the system = earth+you is conserved.
If you start running you do slow the Earth down as you push against it, then as you stop you speed it back up (or the other way around depending which direction you run in).
 

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