This was 15 years ago now so memories are fuzzy. Weirdest things I saw? How sad people's lives could be. The saddest one was a woman came through with her child at 11:30pm, and she was clearly heavily buzzed if not full on drunk. Yelling at her kid who was obviously tired and wanted a happy meal. No kids seat or even wearing a seatbelt. One of the few times I called the police.
As for fun things? All of those jokes and pranks you see online or think will be really funny? I saw them dozens of times. They were never original, they were never funny, everyone thought they were the funniest person for asking for a whopper at a McDonald's. Gets to the point you know just to type in big mac, tell them the price, and have them move forward. I was making $7/hr. Whoa look we're having fun at the expense of the minimum wage employee who'll be fired on the spot if they say anything negative. The ice cream prank? Seen it. Hamburger no meat no bun no condiments? Seen it. We're not neutral faced because we're annoyed at you, we were all tired of hearing the same boring jokes. It was all lame dad energy, but coming from teenagers.