Apple Pie: good.
Hot apple pie: good.
McDonalds Hot Apple Pie: the foodstuff of Satan.

I have no idea how they manage to superheat the filling in those pies to approximately the surface temperature of the Sun. I can state with near-certainty that at least 90% of the world's spontaneous combustion cases were caused by eating said pie.

Usual chain of events:
1: "Oh, i think i'll have a Hot Apple Pie"
2: "This looks gorgeous"
3: Head bursts into flames.