Matt_Parker_2 | Vibrating spikes in a garden centre @mattparker2 | Uploaded 6 years ago | Updated 10 minutes ago
Twanging spikes on a metal grasstree causes a few (but not all) of the other spikes to vibrate as well.
Twanging spikes on a metal grasstree causes a few (but not all) of the other spikes to vibrate as well.