My friend Humphry told me a story about what happened to him some years back, and I thought I'd share it with the rest of you people.
It seems good ole Humphry was out deer hunting with a buddy of his. After they parked the truck, the two took off different directions, agreeing to meet back at the truck some time later. Hours passed. Eventually Humphry came back, finding his friend drinking coffee in his truck. Before they left, Humphry went off in the woods to take a dump while his buddy warmed up the truck. A few minutes later Humphry returned, all happy and content.
While driving back from the woods, they both smelled something peculiar, but said nothing at first. Several minutes passed, and then the driver asked if Humphry had farted. Humphry said no, that he thought it was his buddy. After a minute or so of fart bashing each other, they agreed it must have been a sewage drain or something of the sort.
Moments passed, and then they both smelled it again. This time the driver, getting angry, told Humphry to stop farting, and if he HAD to keep farting to roll the window down and give him warning. Humphry insisted that he wasn't the culprit, and since the driver accused him of doing the deed that it must have been him. A fight ensued until the driver pulled over and they both got out to inspect each other for signs of the odor.
They looked under their boots and on back of their pants for the mystery odor. Then they decided to see if something somehow got attached to their boots or clothing and managed to make it in the truck, so they inspected all the gear they put in the cab, the seats, under the seats, the floor mats, everywhere.
Several minutes passed while they inspected each other and the inside of the truck again, until the driver came behind Humphry and said he had found the source.
When Humphry had gone off in the woods to take his dump earlier, he unzipped his coveralls, dropped them to his ankles, and pulled them between his legs so not to poop on his clothes. Not a bad idea. Well, he didn't pull them far enough, because Humphry had pooped a monster log into his own hood. He'd wiped his ass all nice and clean and zipped up his coveralls and went back to the truck, and for the last fifteen minutes good ole Humphry had been riding around polluting the cab with a steaming butt nugget three inches from the back of his head.
-- Ziburism