But look how colorful the tents are!

Ketamine. The literal answer is ketamine.

https://www.cnn.com/2024/03/18/tech/elon-musk-ketamine-use-don-lemon-interview/index.html

Ketamine, when abused recreationally, can cause some concerning psychological and physiological symptoms, some of which may correlate to Musk’s current behaviors.

https://pmc.ncbi.nlm.nih.gov/articles/PMC8972190/