We are but a spinning plate in the grand cosmic microwave oven of the universe

... explain?

Piss off with you pro-establishment crap.

I think it was either a Miniminuteman or a Folding Ideas video that showed what some flatties proposed: the Sun moves in a wacky repeating spiral pattern above the surface. It's closer to the Arctic during summer and to the Antarctic during winter, which they claim to explain the different angles of incidence. Obviously that doesn't conform to any physical laws... observed phenomena... ideas that a person of ordinary intelligence might come up with... their own models of flat Earth... but flatties are nothing if not persistent in their dogmatic rejection of reality.

I imagine it is like moving a lamp over a table. Closer parts have summer and further away parts have winter.

very easily:

The earth is flat; it’s just space that’s curved.

Their worldview is heavily built around Christian magic nonsense: The sky is a dome (firmament). Gravity doesn't exists, it's just buoyancy. They probably assume wind currents change and blow the cold off the icewall surrounding the world edge...

They think earth is flat and space is 3d