I'm pretty skecpitcal about this body-bomb story. It started off the bomb was in his arse (plausible I guess) but now it appears to have reversed up his digestive tract. The Saudis claim it was in fact hidden in his underwear.

Also:

"It sounds almost like drunk logic, where an idea sounds great until the next morning and you're sober, going, 'Noooo, that won't work,'" said Paul Worsey, a Missouri University of Science and Technology researcher and inventor of explosives. "Unless you're actually hugging somebody, nobody's going to get badly hurt."

"The force of such an explosion would be in the direction of the easiest exit," he said, laughing off the threat. "The rest of the body would work like a sandbag against the blast ... though it would be a mess."
Sounds like a media feedback loop. Stomach story first appeared in The Scotsman on Sunday, then picked up by wider press.