On a recent UA flight I was traveling with my entire family, including toddlers and mother in law. We weren't slow but it was taking us a little bit longer than normal to get our stuff together and get the kids off. The FA came and told us sternly, "Sit down and let everyone else off first". Yes, we had to wait until the entire plane had deboarded before we could get off.

I've been flying for many years but somehow my bad FA interactions always seem to happen on UA.