An office I used to work in had a cafeteria that hired professional chefs. On Fridays, they ran "experiments" on some stations, notably the pizza station. They came up with a bunch of really wacky pizzas; the poutine pizza and chicken & waffle pizza were some of my favorites they made. The Sloppy Joe pizza was the only time I've ever needed a fork and knife for pizza, but somehow wasn't awful.

They did a gumbo pizza one Friday, and it was very confusing. They served it on a big, NY-style slice and used pureed gumbo in place of tomato sauce. It tasted pretty good, but had neither the flavor or consistency of either pizza nor gumbo. Probably would have worked better without cheese, but there's potential in those flavor pairings, IMO.