Ladder Jump

A Ladder Jump is a two-frame jump (0.03 seconds) at a precise point of a ladder, as the top of the ladder rail transitions from vertical to horizontal. If you jump at the right part of the transition, the game treats it as a sloped rail, allowing you to do a normal air trick, but with much greater vertical velocity.

Ladder Jumps are currently only useful in Fortified Residential Zone, but the technique is possible on any ladder.