They really needed a sign for that
There’s actually a very important issue that we need to address. Why is it that construction workers only install balconies on above-ground floors? Why not place a balcony in front of the front door? Oh, wait, that’d be a deck or a porch, right? By definition, balconies are never on the first floor, so if you dive head-first from a balcony, expect to break a few bones upon landing.
We don’t think anyone would intentionally go diving off of a balcony with the expectation that they’re on the first floor, but you never know. Some people make it a personal mission to become to most illogically thinking person on the planet. You’ll find many of them in the good ol’ US of A.