It made interesting noises (little explosive pops, like tiny firecrackers, as well as the sizzling and bubbling) and very chemical smells (from the melting plastic tray) too.
Note to self: Do not use the oven when distracted and when the brain had been dithering between toasted cheese sandwich (which does go on the top rack at BROIL) and the enchiladas (which...um...don't.)