Is something burning?

Tonight I decided that when I got home from work I was just going to pop in a frozen pizza, crack open some beers and we would just try to unwind as much as possible while taking into consideration our indoor camping lifestyle. KCA was really hungry so she asked if she could preheat the oven before I got home, and I told her to go for it...

When I got home we talked for a bit and as we were talking I laid the pizza, still in it's box, on top of the stove. I turned around to talk to KCA and she saw smoke coming up from the stove. She told me to take the pizza off the stove because it was starting to burn and I quickly removed it, but when I picked up the box even more smoke came out of the oven. This did not make sense. It was clearly not coming from the box or from the stove top, it was coming from the oven. "Do you smell that?" I said to KCA. "Yeah, something's burning." I opened the stove to find a small FIRE. "Did you take out the manual?!?!" I said. "Oh NO! There was a manual in there?" KCA responded "Yes!" I said.

Without thinking about it I reached into the oven and pulled out the manual still on fire and surrounded by melted plastic from it's packaging. I threw it into the sink but it left a HUGE mess in the oven. Needless to say we did not end up making the pizza in the oven. Instead I mocrowaved an oven-bake pizza while I scraped plastic out of our oven with a razor blade.