No Nightmares for Me, Thanks

Would I have been thrilled or terrified to go to bed if this had been my nightly resting place through grade school? I'm betting mostly the former, but with frequent screaming nightmares.
Very cool, but in the end, I think I'm grateful for a plain old rectangular mattress with no toothy things in my field of view. I've seen this in a number of places today, but the source appears to be here. A number of other pictures too.