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.
Quiz: Can You Guess These Back to School Prices?
Though this experience was new to Williams, several other people have tried it and had similar results:
Read next: Watch a Cow Mascot Treat a Supermarket Like Its Own Personal Club
More Must-Reads From TIME
- Jane Fonda Champions Climate Action for Every Generation
- Biden’s Campaign Is In Trouble. Will the Turnaround Plan Work?
- Why We're Spending So Much Money Now
- The Financial Influencers Women Actually Want to Listen To
- Breaker Sunny Choi Is Heading to Paris
- Why TV Can’t Stop Making Silly Shows About Lady Journalists
- The Case for Wearing Shoes in the House
- Want Weekly Recs on What to Watch, Read, and More? Sign Up for Worth Your Time
Contact us at letters@time.com