Cranberries contain a massive amount of natural pectins. They will gel all on their own, which is why you can basically make cranberry sauce out of filling.
Alton BrownThe jewel of the lard is right around the kidneys. But this is a fat that has a very specific crystalline formation and a high melting point.
Alton BrownEnough people have now mentioned Bill Nye the Science Guy to me that I now desperately avoid it all costs.
Alton BrownYou know, [skin] happens at the gravy boat stage - right? - or this happens when you're trying to keep it warm. So the way that I avoid this is I keep my gravy - the second it's done, I put it in a thermos, which will keep it hot and will prevent air from getting to the surface. And I keep it there till the last moment. The last thing that goes out to the table is the gravy, and I pour it out of the thermos and immediately move it in.
Alton Brown