Messed up footholds?

There's plenty of background objects you can stand on. I'm not sure why you can stand on the rims above the Ghost Ship entrance, or why everyone can walk tightropes, but there's plenty of stuff you can stand on nevertheless.

Personally, I like those kind of map objects. It makes the place seem more... Fun. Anyway, that's just me.

Going on-topic, I think he means invisible platforms that you can actually stand on. And not background objects.