Sorry for the picture, but it matches this story perfectly. :)
Apparently, a woman lit some matches on a plane to mask the smell of her recent flatulence. Well...you can probably imagine where the error lies in her reasoning. Read on for more detail.
A good quote from the story....
"It's not the first time the trouser burp has been implicated in an aircraft scare. Back in 2003 a novelty farting dog sparked a US terror alert when its "wind-breaking mechanism registered as a high explosive on sensitive monitoring equipment"."