I wish I could but probably can't based on the SF Museum of Art (or whatever it's called). It has a catwalk between two parts of the museum. The floor is glass and everyone walks across it fearlessly, or so it appears. I didn't expect my reaction, literally couldn't move my legs. What stinks is at least to a new visitor like I was, it wasn't as easy to find a way to the other part of the museum without using that obnoxious walk. I also can't sit on the ledge of anything high off the ground or see people do it. It made me a nervous wreck watching my brother and sister do that and the feeling remains today. Yet since I was a kid, I also envied birds who can fly anyplace, sit on a limb, thought that was really cool.