3 men get stranded on a desert island. After wandering around a while, they are found by some tribesmen. The natives take them back to their hut. The chief tells them, "Go out into the jungle and collect 10 pieces of fruit."
The first guy returns with 10 apples, and the chief says "Now shove them all up your ass without showing any emotion, or we'll kill you."
He shoves the the first up, and is in terrible pain, but shows no emotion, but during the process of pushing up the second, he flinches, and therefore gets shot.
The second guy comes back with 10 cherries, and gets told to do the same.
He's finding it relatively easy, but when he gets to the eighth, starts laughing hysterically, and gets shot.
He meets up with the first guy in heaven, and the first guy asks, "Why did you do that, why did you laugh?" and the second guy replies,
"Well I nearly finished when I saw the next guy walking up with pineapples!"