Do you go to a corner in your house if you get hit with a tornado?

A basement would be the safest place during a tornado, but many homes don't have a basement. If yours doesn't, you need to go to an innermost room/area of your home where there are no, or few, Windows. A hallway is sometimes the safest place, sometimes the bathroom, particularly the bathtub is the safest place. It just depends on each individual home.

If you can, get under a mattress, but not under the bed. If the bed were to fall on you, it could cause serious injury. If you have a twin size mattress, that would be ideal since it's lighter than a larger one, and you can drag it to the safest area of the home more quickly.

And under NO circumstances do you go upstairs if it's a two story home.

If you do have a basement, going to the corner is recommended as the ceiling above you is supported by two walls and therefore less likely to collapse. Mobile homes and manufactured homes should be abandoned for a nearby, studier shelter that has been decided on ahead of time.