That ~~face~~ grimace, he just started falling down a k-hole.
Ketamine is a hallucinogenic drug that can cause a euphoric, out-of-body sensation known as a K-hole. Ketamine is used by healthcare professionals for certain medical purposes under controlled conditions.
However, it can cause serious psychological and physical side effects when used recreationally, chronically, or at high doses.
Source
I personally don't mind a little, occasionally.
Edit: i almost forgot: Fuck this son of Musk ( his father is even worse )
Dang, not as great as the first option, but I'll take it. Make it a double.
Additionally, long-term abuse of any dissociative drug (but mostly k, afaik) has been documented to cause a specific type of brain damage; known as Olney's Lesions, a common term would be holes in your head. It can be an incredibly destructive drug.
Wikipedia page
Study by Olney et al.