I have that problem when I sit too long in "The Library", with newspaper or interesting book, and then when I try to "finish the paperwork" and get up, I find that my butt and legs have "gone to sleep", and so there I stand, holding onto the basin, cabinet doors, or whatever, while the feeling tingles its way back into the nether regions.
If someone yelled "tornado" or whatever along about then, I'd be in a world of hurt ! !
Had an interesting bit of trauma somewhat along those lines last Thursday, and it is STILL not totally cured, but is going in that direction:
Some friends invited me to go on a 4-wheeler excursion in a remote area, and the ride lasted all day for 50 miles and was on rough trails with almost incessant pounding of the butt on the seat, and when I got home that night and hit the showers, I quickly discovered that a HUGE blister had formed and then broken at the base of the spine over the "tail bone" extension, or caudal appendage, and I hadn't noticed it because of all the other attention-getting aspects of the ride, the potholes, rocks, cliffs, drop-offs, etc.
I believe there was significant bruising accompanied the blister, also.
My machine, a large Honda, has likely the best cushioning, suspension, and ride of any 4-wheeler, but apparently my little scrawny butt just didn't have sufficient padding.
My wife found some egg-shell foam pieces in the attic, and they have been invaluable, and I think when I go back out on the 4-wheeler, they will accompany me for added insurance.