It’s not a glitch, it’s gameplay!

What is something you thought was a glitch but was actually a part of the game/gameplay?

I’ll start:
High School Years - T-Pose Challenge
When I first started following my teen sims to school I noticed many teens who were “stuck” in the T-Pose. Thinking it was just a minor glitch, I would reset the sims and continue playing. It wasn’t until last year that I completed one of the teen aspirations that has your sim join a T-Pose challenge did it dawn on me that the sims weren’t stuck!