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Here is a fun effect. I wonder if it has been described previously, given how simple it is to reproduce. I remember seeing similar effects with an empty plastic bag, spinning midair on the side of an air updraft.
The forum discussion centers on the phenomenon of hydrodynamic levitation, specifically highlighting a simple effect that can be reproduced using an air jet. Participants noted the effectiveness of an empty plastic bag spinning midair due to an air updraft, and contrasted it with a water jet that was primarily vertical. The discussion emphasizes the versatility of the effect, as it can also be achieved with an angled air jet.
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