Roni uses the hammer to open his coconut
Here's a description of the contestant's attempt. Someone's probably working on collecting some images to illustrate it.
Roni initially chooses to use the bow and arrow, and tries to break open the coconut by shooting it, but both misses and loses the arrow.
He then simply breaks open the coconut with the hammer.
With a single time penalty, he completes the task in 9 minutes and 6 seconds.
(Written by TRoosevelt1776 and proofread by Karl Craven)