Yeah, drives me crazy when they want to know what was going on INSIDE when I was sitting in my car OUTSIDE.
Sometimes (rarely), I can explain -- "The car in front of me was at the speaker for over 5 minutes, as there were several passengers in the car, and they kept changing the orders. I know this, because I could hear them at the speaker." "The car in front of me was at the window for over 5 minutes. I saw them receive a bag of food, then 38 seconds later, they handed the bag to the person at the window. The rest of the time, they waited until the order was delivered to them." I can only report what I see/hear; I can't tell them what was going on inside, LOL.