In Safari (iOS 18.3.1) if you set the Mass slider to 0 and increase Tension, not only does the app crash, but a repeated clicking noise starts, and persists, even after the tab is closed - even after Safari itself is closed! Seems to be a Safari bug. I have reproduced it 3x.
If you reproduce this and want the noise to go away you have to start another app that tries to play sound.