Urban Legend? Source of endless amusement? Please test and report back...

I found this on docbrite's journal:

have you ever tried loosely tying a tube sock around the midsection of a cat?

They instantly fall over and think they can't get up...has something to do with their balance...and since it doesn't hurt kitty in anyway, this is an amusing way to kill a couple of hours the next time you're bored. It's even more hilarious to do while drunk.