serosiusly pull together it

I've seen some awful misspellings and mistranslations during my time abroad, but I may have found the most atrocious perpetrator this evening.

I was reliving my near-death experience in the Gorges de Verdon, the Grand Canyon of Europe, on YouTube at Mama's suggestion when, in a particularly frightening video involving bridge jumping, I found this official-looking, most likely government-posted sign...



... to which I can only say "Huh?"