What's The Deal With Quick Sand?

Last night I said "This memory foam is like f-ing quicksand!"

I hate the memory foam. We have memory foam so D's back won't hurt, but my back hurts because of the memory foam. The thing is that I'd rather have a hurting back than hear D complain about how much his back hurts. This being said, I shall complain now because this is my blog and I can complain if I want to.

I hate it hate it hate it hate it. I wake up feeling like I've run 50 miles. Last night I slept with a stuffed animal under my back so that my back wouldn't curve into the foam. In the past I could tolerate the memory foam because I could go back to my nice, normal mattress and undo the damage done by the foam. But now there is no relief. I cannot wait to get to the hotel on Friday and sleep on a normal mattress.

The point of all this is - what's the deal with quick sand? Does it really exist? If so, where? And what is it? And do people really sink into it? Do people die? If so, do they just disappear? Bizarre. I must investigate this afternoon. D said that he doesn't believe in quick sand. I'm not sure that I do either.