Delilah used to do that all the time, when I had her in the glass tank... she'd climb up to the wires (it had a built-in lamp fixture), hang out there for a while, and then THUNK to the bottom. They can actually hurt themselves by falling, so you might want to add a taller log or something - then she can lower herself more slowly. Now that mine are in tubs, they can't fall or stick to anything!

Beautiful snake, btw... she has a very interesting pattern, almost like a cinnamon or pastel.