New Super Intelligent Police Dog
a new police sniffer dog is introduced to the force, and is taken to the airport for trials
the airport manager insists that the trial takes place on board an aircraft that is about to depart and, despite misgivings, the pilot agrees to the trial
the policeman stays in the cockpit, sending the dog into the passenger cabin - and five minutes later it returns, and promptly stands on its' hind legs - and spins round
"a nice trick" says the pilot "but what does it mean?"
the policeman replies "that means he has discovered heroin - row C seat 4"
the dog runs into the cabin again .... and five minutes later, returns and stands on its' forepaws - waving its' hind legs in the air
"what does that mean?" asks the pilot
"that means he has discovered cocaine - row H seat 2"
the pilot is now impressed, and asks for just one more demonstration, and so the dig is sent into the cabin again ...
after five minutes, it returns and begins running round in tight circles wimpering loudly and crapping eveywhere.
as the dismayed pilot watches his shoes, seat, walls, and controls becoming covered in crap he demands to know the reason for the dogs' behaviour
the policeman replies "that means he has discovered a bomb"