This sort of fits the subject.
Once when DS was little, we stayed at (then) Dixie Landings and arrived in the evening. I told him that we would go to MK the next day and he asked me when. I explained that we definitely couldn't go until it got light the next day (my mistake).
I remember waking up a few times during the night and seeing DS looking out the window. He would sigh loudly and climb back into bed. I finally woke up feeling breath in my face and he told me that it was time to go. I looked at the clock and it was about 7. I told him that it was too early and he said "I see light and you said that we could go when it got light." I looked outside and you could just barely see a tiny trace of lighter sky. I knew that we had to go at that point.