Robin put their finger on the doorbell. They were deciding whether or not to ring it.
I was standing on their doorstep with my finger on the doorbell and I could not decide if I should ring it or not. So, did you ring the bell or run away? I just decided to run away when they opened the door to leave. Oh my goodness - what did you do? I couldn't do anything for a minute and then I laughed and said something stupid like "good timing." Ha ha - good save!