Ketamine is typically not used in adults because of frequent association with emergence delirium; however, ketamine is used frequently in the pediatric population, where this effect is not typically elicited.
Inscapapitated I am snot!
From http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2900045/ :
So the hallucinations upon waking from anesthesia are more common in adults (also, of course a 10 year old kid getting a PCP rage like reaction from ket is much less dangerous to medical personnel than a 100kg adult man...)
To me it looks like SerotonergicHaze was correct...

And I would like to add that the quiz was all Trips' idea and nothing to do with me whatsoever
Trips but this quiz can be a headache at times