Had this exact question in December of 2013.
With April 20th just behind us, this questions makes sense. Never occurred to me than that it was a weird time to ask it. Oh, wait, I guess someone was planning on getting fucked up for New Year's. My bad.
I can add to this answer, now. Too high is when you think the floor is 'thick' so you have to shuffle into the darkened bedroom like a puppet with no inner ears.
Short Answer: Terrifying, midnight imagery courtesy of my asshole wife.