Nah, that’s gtaguy. I don’t think he’d need drugs to pull that off.
ACSL was a mob that ran around in the woods for a while back in the Time Before Version Numbers. Sort of a cross between a perma-hostile NPC and a highly dangerous zed. Problem was that a) for a while his inventory/dropfile wasn’t defined, so killing him crashed the game; b) for a while there were lots and lots of him running around the woods.
He’s basically the forerunner of the current Jabberwock, albeit IMO much more reasonable.