If you jump off of a ledge, just before you hit the ground, exit the world and come back into it, it cancels your velocity and causes no fall damage.
MC-13087
Exiting a world while falling cancels your velocity
Resolved
Duplicate
0
Aaron Loyd
(Unassigned)
Unconfirmed
damage, exit, fall, velocity, world
Minecraft 1.5.1
Retrieved
Duplicate of MC-967, please use the search function to see if your bug has already been submitted. Currently over 55% of tickets are being closed as duplicate.