so I was thinking about this, is there a fear/phobia of being on a unsupported structure or platform. like for example, if you are on a bridge and you look down and the part of the bridge you are on isn't supported by a pillar.

also is there a phobia of unreasonably large objects, like when I first went to a local aircraft museum I completely underestamated how large planes are and I was rather freaked out about that.

I know these are random questions but I really was thinking about them