Once I was having one of those oh so wonderful sessions and i did tell T I wasn't leaving. He said, "Fine I'll just tell the next guy to use the couch." I promised I wouldn't listen. LOL

On the issue of timing. My T almost always says it's time to stop. Once in a while I get the message through conversation, like "Are you okay to leave?" He never runs late, but occasionally lets the session run a little longer especially if I'm the last client of the day. There is no clock that I can see from my vantage point. It's facing T, so I'm not distracted by that. He almost never helps me start the session, but waits for me to get it going. (Sometimes a painful silence.) And at the end of the session he'll say, "So today's session was about blah blah blah," sort of summarizing it.