How about this one then. The BA8774 landed on time into Sumburgh yesterday. We delicately off-loaded the bags onto the truck. While putting the bags onto the rollers for collection by the passengers, a parachute flare of rather large proportions happened to fall out of a rucksack. Obviously the passenger was severely told in no uncertain terms that he should not have carried it in is baggage as it was an explosive & could have caused a rather nasty incident. The passenger then said that they always carry one as they were divers.
Upon further checking it was found that they had through-checked their baggage when they checked in at Heathrow.
Not only one potential accident but two. Not mentioning of course that the thing could have gone off while the baggage being handled at all the transfer points.
So why wasn't it picked up by security at Heathrow?