This is probably the dumbest and least safe ways to take shelter from a Tornado. I mean first, they move at whopping 10mph-25mph and have a very very narrow dam

This is probably the dumbest and least safe ways to take shelter from a Tornado. I mean first, they move at whopping 10mph-25mph and have a very very narrow damage path (most are less than a hundred yards). Every number of years you'll get a mega tornado somewhere, but those are rare events. Nearly all deaths in tornados are from people being where they are not supposed to be (first floors, or in a car) or not paying attention to weather warnings. If you _had_ to, you _could_ simply move locations away from a tornado. If you move at 45degree angles to prevailing winds, for instance here in Kansas, that would be west or south, you could sidestep the mesocyclone. If you move northeast, you would increase the time for the mesocyclone to catch you. This is NOT recommended for obvious reasons: If everyone in a neighborhood tried to leave at once, a traffic jam would instantly form, and a car is the worst place to be. But still, if you had no other options, there you go. The simplest form of shelter is a basement and is highly effective. Or on most new slab houses built in my state today, there's usually one room made of CMUs and has a timber ceiling (A 'safe room'). Even if you have a slab house, there are plastic tornado shelters you bury and provide ample protection if you _actually_ bought a house without a basement in Kansas. This thing is the worst of all options: You can't move, you're trapped in it, it's above ground so it's susceptible to damage from flying debris (The main hazard in a tornado), it's not secured so you're going to be in a bouncing tornado hamster ball, and it it rolls onto it's door, good luck getting out. Really the only use would be protect from flood events.