A figure 4 deadfall is a more advanced type of trap but is nonetheless still easy to construct.

The figure 4 is a trigger used to drop a weight onto a prey and crush it. The type of weight used may vary, but it should be heavy enough to kill or incapacitate the prey immediately. Construct the figure 4 using three notched sticks. These notches hold the sticks together in a figure 4 pattern when under tension. Practice making this trigger before-hand; it requires close tolerances and precise angles in its construction.

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