This double loop knot can’t be cinched too tightly, so the police don’t really use it—but firefighters do to pull people out of narrow spaces by their wrists.

Step 1: Make "Q" shape

Cross the end of the rope over the top of the remaining rope, making a “Q” shape.

Step 2: Make second loop

Take the end of the rope, or the tail of the “Q,” and cross it over again, making a second loop to the right of the first loop.

Step 3: Stack edges

Stack the left edge of the first loop to sit on top of the right edge of the second loop.

Step 4: Pull edges through loops

Simultaneously pull the right edge of the first loop through the second loop while pulling the left edge of the second loop through the first loop.

Step 5: Tighten

To tighten pull on both loops.