A 747-400 left heathro and had to return 30min into the flight. Evidently someone dropped off a pungent smelling obama. I would post the web link, but the link heading is not appropriate for young eyes. Iv done that on a charter bus from ft bliss tx to lukin tx. It was so bad the bus driver pulled over at the first exit and found the nearest truck stop. Nowadays, a day or two before my flight from hm to work, i do my best to eat something that would create an internal bio warfare gas. My last flight I ate some corned beef and cabbage. It didn't have the effect I was hoping
