I saw the damndest thing at CDG recently: a suitcase coming up from the bowels of T1 got itself lodged into the roof of the conveyor belt! There it dangled, jamming up the works and the belt stopped. Eventually someone came and pulled it free and the whole shebang started again. By this time pax from the next flight were already milling about the belt and as it's rather cramped in that area...

On the subject of signage T1 is especially interesting since your boarding pass has the satellite number printed on it and not the gate number. And the lounges are miles from the gates and require a tenderfoot badge to locate them behind all the construction hoardings.

Oh, and then I get the sweetest, friendliest immigration chap ever! Even greeted in English despite my pathetic mumblings in French. I think he was enjoying freaking the pax out with such unexpected bonhomie.