Whats something you're embarrassed to admit it took you way too long to figure out?

I'll go first. I was somewhere in the level 30s before I learned you don't take fall damage. I was slowly climbing down all rock faces or buildings and only jumping if there was water or the pile of leaves below. I didn't even figure it out myself which is more embarrassing, I was watching a YouTube video of a guy playing and he jumped off a cliff and he's like "well you obviously don't take fall damage so I'm jumping off this" I was like "wait... what???"