Sudden rave

Caterpillar rave!

Watch as a man screams at caterpillars to evoke a reaction

Lmao if I came to your house and blasted some shitty music at 2am you also would be jumping around

Not sure if this is 100% accurate, but it seemed interesting: supposedly this is because these caterpillars have are vulnerable to a type of fly that likes to attack them when they're basking. The fly glues it's eggs to the caterpillars' heads, and the maggot eventually burrow inside the caterpillar, killing it. As a result/defense-mechanism tthey react to frequencies similar to that of the fly, causing them to shake about violently to discourage egg-laying
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https://amp.nine.com.au/article/d0a1766d-2e59-4857-8fcf-6d88faa094df