There are many Jump Quests in MapleStory. On GlobalMS, the following NPCs give a Jump Quest if the character meets the required level:
Shumi at Kerning City (3 quests)
John at Lith Harbor (3 quests)
Sabitrama at Sleepywood (2 quests)
Assistant Cheng at Ludibrium Toy Factory (1 quest)
Adobis at The Door to Zakum (1 quest)
A character starts at one part of a map, and uses timed jumps to get from one small platform to another, while attempting to avoid enemies and obstacles that can knock the character(Maplestory powerleveling) off of the platform, causing them to be forced to either start over from the beginning, or, if the character is lucky, from a certain point somewhere above the beginning. Jumping Quests can become highly annoying if the character continually falls off. Success in these quests requires great patience and control.
An impatient person who gets furious whenever he/she falls is less likely to succeed than a patient jumper that perseveres. Jump quests in game(Maple Story Mesos) will also fit the background of which town the quest is located in. Shumi's jump quests will require jumping platforms in a subway, avoiding Stirges, Jr. Neckis, laser beams, electrical wires, and oil splats. John's quests involve jumping tiny platforms while dodging balls of spikes and moving stars.