Boy does that picture bring back a certain memory.

When I was about 12 I went out one night to fill up a hanging feeder about like the one in your photo, little did I know that on the back-side "Rocky" was having a snack.

As soon as I touched the feeder Rocky vacated his diner heading for a tree directly behind me.
That little bugger flew / jumped by within inches of my face

After that I always checked to make sure the coast was clear before I even got close