Dry quicksand‘s prevalence in nature may be debated, but it has been created by scientists – so it exists. Of course, if you’ve ever watched The Princess Bride or Mad Max: Beyond Thunderdome, you know dry quicksand’s potentially devastating effects.

Well, here’s a nice demonstration into the Jenga-like principles behind dry quicksand from geologist Matt Kuchta.

[Matt Kuchta via BoingBoing]