I’m sure I’m not the first person to sit on a toilet with the lid down for whatever reason. How damn annoying to find out as you sit down that the lid, despite it’s sturdy look, is actually rather flimsy. It’s likely this isn’t something you’ll do in your own house, I imagine you know the strength of you own toilet seat, so having to explain the now obvious dint and the noise you were making trying to bash it out could be a little embarassing.