One time, I spent 15-20 minutes in a session in silence. My T told me that if I ever did that again then she would pull out a book and start reading. She did NOT like the silence. The next session she was the most animated I've ever seen her, I think I got under her skin a lot.

I brought it up a year and a half later. She just said she didn't have the attention span to sit in silence for that long, that she hadn't meant to be punitive. I actually think she's kidding herself...