Three explorers and a cannibalistic tribe

There were three explorers out on an expedition when they suddenly realized that they were lost. They walked around for hours when finally they saw smoke in the distance. They knew there must be a civilization there so they headed in that direction.

When they got there they were confronted by the warriors of the tribe and were immediately tied up and held captive. Later, the leader of the tribe confronted them and explained that their tribe was a cannibalistic tribe and that they would kill them, skin them, eat them and then use their skin as a canoe but they would be able to choose how they would be killed.

The first explorer says ""I brought a gun with me on my expedition, I wish to be killed with that." So they pulled the gun out of his backpack and shot him.

The second explorer says "I too wish to be killed by the gun as I believe it would be the most painless way." So they shot him as well.

The third explorer says "I have a fork in my backpack and I wish to be killed with that. I would however, like to do it myself."

The tribesman all looked at each other puzzled, but figured he could not possibly harm them with a fork so they agreed.

The explorer then began to repeatedly stab himself in the chest. The tribesman again looked at each other with puzzlement on their faces so the leader of the tribe asked the explorer "What are you doing?" to which the explorer exclaimed "I'M FUCKIN' UP YOUR CANOE!!"