Is it normal to dream that you ara falling off a chair and wake up scared

I once dreamt I was at a library with an upper floor overlooking the bottom floor, but the upper floor had no railings, so I fell down to the bottom floor and the dream ended. I later had another dream at the same library, but there were railings because I succeeded at suing them. That time, I went to the top floor, stood in the same spot I did last time, and then fell through the floor as it collapsed beneath me.

I seem to dream of flying more so than falling.

There was a time I really did wake up on the floor after falling asleep in a chair. Never did it in a dream though.

Not exact but similar dreams seem to be extremely common. If you have them every night it becomes less normal..