I described vertigo to someone once as being trapped on a carnival ride that spins around and around and around...except that it never stops.

I also described vertigo that hits you with no warning as being on the ride, but you dont know when the ride will start up. You could be just standing up to get off the ride when it starts up again...and then you have to hang on for a long time because you dont know when the ride will stop again.

I described bone deep numbness as when your foot falls asleep...except that it stays that way, and you cant tell where your foot is...and you never get it to wake up or even get as far as the pins and needles sensation.