BIG KAHUNA _ Tavern Puzzles Heavy Metal Disentanglement-Style Brain Teaser Old fashioned heavy metal brain teaser disentanglement puzzles. Double click on image for enlarged view. Objective of Big Kahuna is to remove the large 3" diameter ring which is found hanging towards the bottom of the puzzle. Replacing the ring to the starting position is equally as challenging. Rated as a level 3 "Difficult / Severe" (on a scale of 1 to 4). On this scale both level 3 and 4 are very challenging. Comes with the solution (white box not included)