Two things that scare me, a little:

1. Squirrels on power lines. Jebus, but I don't like when they cross right over me while I'm standing on the street. There's always that chance, you know: falling and scratching and rabies. I don't know anyone this has happened to. But I could.

Also, sometimes they electrocute themselves. Or, bring down the power grid. Or, in Scotland, sometimes they do both. Just a menace.

Source

2. Small, crowded spaces. And thank you, Beijing, for making me confront and semi-conquer that fear, over and over again. 

     

Left: line for one of my teaching jobs, elevator. Left: line for the subway, transfer, rush hour.