MapleStory Physical Fitness Challenge

This event is by far the most difficult, encompassing parts of all other events. Players must overcome a Jump Quest populated by Super Jr. Neckis. The next map has no Necki but is also a jump quest styled area. The third area, also monster free, is increasingly difficult. Lag generated by the other event participants can hamper progress significantly. Finally, the Super Necki return on the last map, wreaking havoc on tiny platforms. By proceeding through the portal the player receives their prize. If they do not finish in the allotted time, the players are merely returned to where they were.
http://strategywiki.org/wiki/MapleStory/Quests/GM_Events