Its use as a street drug stems from the fact that it also can induce hallucinations, but it also has other effects.
Especially when waking up from it, I can even see it happen in animals, they get afraid of things that aren't there at all!
Every time people hear I'm a vet student they either ask for ketamine or for equiboost (horse testosterone), didn't know the street name was special K, I guess @justtryme90 has some street knowledge!
You pick up on a few things when people joke about stuff when working for Pharma.