The Monster Box is an event that has made an appearance in every Sportsman competition to date, with the Pro Sportsman No. 1 2010 competition being entirely a monster box special. The event itself is a cross between the Olympic style high jump and vault competitions, where competitors must run down a runway onto a springboard and vault over a wooden pyramid shaped box (the monster box) that increases in height after all competitors have attempted the current height. Competitors unable to complete a given height, are eliminated. The current world record of 23 levels (3m 6cm) is held predominantly by Iketani Naoki. Other world record holders include Yeo Hong-Chul, Morgan Hamm, and Mizutori Hisashi.