Dead bodies, falling, and suffocation/being crushed. Not to freak anyone out but I knew someone that died that way and recently a building near me spontaneously collapsed (no one was in there, though) so it is a real fear! Also, animatronics. I was terrified of them long before Five Nights at Freddy's. Once my grandmother put me up on the stage at Chuck. E. Cheese, by the animatronics and I screamed until she set me down . Westworld did not help my fear of them!
Also, after reading what Arianna Stonewater wrote, I thought that I have a hard time witg bunk beds because the top triggers my fear of falling and the bottom triggers my fear of being crushed. I'll just sleep on the floor, thanks!