I've been there a few times and saw it with a layer of clouds below the south Rim but never filled up like that. It would be cool to see.
But consider the kid seeing the Grand Canyon on TV, in movies, travelogues, books and magazines. He develops an insatiable desire to see it, but family vacations are always at the beach. The desire grows into an obsession. Then his frat brothers say, "road trip", but he did the brown acid so they dumped him at a hospital and went without him. Just before he graduated his girlfriend announced her pregnancy so it was a scramble to find work, a place to live and get married, followed by a mortgage, dogs, cats, kids, and vacations at the beach in the in-laws condo. When finally the kids have taken everything of value and moved out, a concentrated saving spree with expired and dented food cans, and sitting in the dark a lot, there is enough money to make a modest trip to see from the South Rim Visitor's Center that glorious spectacle, nine miles wide and a mile deep. Money dictates only a one day stay and a cheap motel far from the park but at last the life long desire will be satiated and the biggie off the bucket list. You know what he saw, don't you. Now rare and cool it may be, but it's not the damn canyon.
