At night, someone is taking a shit by the haystack. At first, I thought there was a ghost. What was the original joke?

On a dark night, a man drove through a graveyard at night. The breeze blew, and the surrounding sounds rustled, making people feel creepy and numb. Just then, he suddenly found a little red light flashing in the distance. His first thought was "jack-o'-lantern". So he carefully picked up a stone and threw it at the lamp. I saw flames swaying behind another grave. What is even more frightening is that he picked up a stone and threw it at the fire, only to see the light fly to another grave. At this point, he is close to collapse. So he picked up another stone and threw it at the lamp. At this moment, I heard a voice from behind the grave: "Shit, who is it? "Shit is not fun. A bag of cigarettes chopped me three times. "