Hmmm, I've only experienced the happier cat-walking-on-bed feel. Several times I thought my cat or cats were on the bed with me and ehen I've woken more thoroughly realized that both cats were in view NOT on the bed. Every time I've greeted my Rainbow Bridge love bug, Sassafras Root "Sassy", and the feeling's gone away.

I find it reassuring. Don't think I'd like the shaking thing at ALL.