How much weight can cribs really hold?

I have a convertible crib so I would say mine probably holds more than the average, having around a 50lbs weight limit according to the user manual. I assumed most were 30-50lbs depending on the brand and such. But I have seen videos of a whole ass parent getting into cribs WITH their children and then sneaking out after they are asleep. How much weight do y’all’s cribs really hold??

Disclaimer: I’m just seeking opinions and stories from parents for fun because my mind was blown that this was possible. My crib mattress frame is held up by 4 screws and I promise my PP lard butt will break it and I would never 😂 comments shaming myself or each other over different parenting styles will be deleted