I didn't think any of our cats would ever do this.
Squee has developed a fascination with climbing and danging from the living room curtains. I honestly have no idea how to make her stop - the blinds are raised so she can look out those windows, but I guess she'd rather do some climbing and watching.
I don't think she's bored, either, because I was just playing with her and then surprise! Danging from the curtains once again...