October 15, 2014 10:54 AM EDT

Cory Williams, who runs a YouTube channel all about life in Alaska, made a very interesting discovery lately: skipping rocks on a mostly frozen lake leads to a surprisingly cool sonic experience (skip to 3:45 in the video to hear). Williams was totally not expecting the sound, which is kind of like a laser or some kind of chirping bird. Watch as he gets really, really excited about this revelation and then searches for more stones so he can hear the sound again.

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Though this experience was new to Williams, several other people have tried it and had similar results:

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