How to tell if your turkey is done

Good idea for all of us popcorn lovers.
I thought this sounded good! Here is a turkey recipe that also includes the
use of popcorn as a stuffing ingredient - imagine that. When I found this
recipe, I thought it was perfect for people like me, who just are not sure
how to tell when turkey is thoroughly cooked, but not dried out.
Give this a try.

1 - 15 lb. turkey
1 cup melted butter
1 cup stuffing (Pepperidge Farm is Good)
1 cup un-popped popcorn (ORVILLE REDENBACHER'S LOW FAT IS BEST) Salt/pepper
to taste

Preheat oven to 350 degrees. Brush turkey well with melted butter, salt, and
pepper. Fill cavity with stuffing and popcorn. Place in baking pan making
sure the neck end is toward the front of the oven, not the back.

After about 4 hours listen for the popping sounds.

When the turkey's butt blows the oven door open and the bird flies across
the room, it's done.

And, you thought I didn't cook.