A heavy log or stone is propped up by a trigger mechanism.
In traditional bushcraft and trapping, building a deadfall refers to the specific geometry and mechanics of a trap (like a Figure-4 or Paiute deadfall ) used to catch small game. Deadfall
If you are looking for how to use deadfall for a fire, "proper paper" might refer to the or tinder used to ignite larger pieces of fallen wood. A heavy log or stone is propped up by a trigger mechanism
Birch bark is often called "nature's paper" because it peels in thin sheets and contains flammable oils that burn even when wet. Deadfall