That would be frightening for sure. It reminds me of when I was an Air Traffic Contoller in the Army. We were on duty in the control tower 110 feet above ground level and the top of the tower was swaying 6 feet one way from center, then 6 feet the other way when two tornadoes spawned by Hurricane Camille in August of '69 came through our airfield. The sergeant in charge asked for volunteers only, but all 4 of us stayed on duty. We got over 100 aircraft on the ground safely, then watched as the high winds flipped over the airplanes that had landed and weren't tied down. Funny thing is, we were too busy to be scared, but we should have been. We watched both tornadoes cut a swath through the wood snapping giant trees off about 6-8 feet off the ground. What a mess.
Sorry for the Hi-Jack, but I got started sharing and couldn't stop.