Three girls named Samantha, Janet and Rebecca were driving through the country, when all of a sudden their car stalls. Samantha remembers seeing a farm a little ways back, so her and Janet walk to the farm, leaving Rebecca guarding the car.
When Samantha and Janet get to the farm, they tell the farmer what happened. The farmer raises a gun to their head and tells them to get a fruit, vegetable, whatever, just get something from the garden. Samantha grabs a turnip, and Janet grabs a single grape. Just as they come back into the farmer's house, Rebecca walks in. He tells Rebecca to do the same as they just did, and Rebecca heads off towards the garden. While she's out in the garden, the farmer tells Samantha and Janet to shove whatever they have up their butt, and who ever laughs, dies. Samantha laughs first, so the farmer shoots her. Then Janet laughs and she gets killed too.
So they are floating out of their bodies, and Janet asks Samantha why she died. Samantha said that the thought of sticking a turnip up your ass was just too funny. Samantha then asked Janet why she laughed, Janet said: "I saw Rebecca coming around the corner with a watermelon!"