I had many door knob moments because while talking about something else I would be trying to decide whether or not I wanted to talk about something that is harder for me to bring up. Mostly it was because of fear of being judged, or feeling stupid, and or being ashamed. I got better at bringing stuff up but still would have those door knob moments because many times by the end of the session I would be ready to talk about the important things but by then there is no more time.