The Doorknob Drop is an obstacle, firstly introduced as the fifth obstacle on American Ninja Warrior 10 in Los Angeles.

It featured 2 boomerang-shaped boards, with the second half of the first board facing each other with the first half of the second board. Each board contained a different number of doorknobs. The first board was symmetrical, while the second board had its first half much shorter than its second half.

Competitors must climb up a rope to reach the first board. Then, they must use their upper-body to traverse the first board's doorknobs (in a similar fashion with the Doorknob Arch). After that, they must make the transition to the second board by turning their body around, then traversed the second board's doorknobs, and finally made the dismount to the landing platform. When the competitors made the transition from the first half to the second half of each board, it would tilt in favor of their weight. It took out many top-notch ninjas such as Flip Rodriguez, Kevin Bull, Grant McCartney, and Gabe Hurtado

The Doorknob Drop during Celebrity Ninja Warrior: Red Nose Day 2

The Doorknob Drop was attempted early during Celebrity Ninja Warrior: Red Nose Day 2. However, the number of doorknobs was reduced to 22 (13 doorknobs on the first board and 9 doorknobs on the second board), and the doorknobs were more peg-like. Among the 5 celebrity competitors who attempted the obstacle, only Derek Hough failed to complete it.

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