A man had just settled into his seat on the plane when another man sat down and put his black Labrador Retriever next to the man. The first man asks why the dog is allowed on the plane. The second man explained that he is a DEA agent and that the dog is a "sniffing dog". The plane takes off, and once it has leveled out, the agent says: "Watch this." Sniffer jumps down, walks along the aisle, and finally sits very purposefully next to a woman for a several seconds. Sniffer then returns and puts one paw on the agent's arm. The agent says, "That woman is in possession of marijuana "Say, that's pretty neat" replies the first man. Again the agent sends Sniffer to search the aisles. The Lab sniffs about, sits down beside a man, returns and this time, he places TWO paws on the agent's arm. "That man is carrying cocaine.
"I like it!" says his seat mate. Again Sniffer walked up and down the aisles and then came racing back to the agent, and proceeded to poop all over the place. The first man is really grossed out by this behavior and can't figure out how or why a well-trained dog would act like that, "What's going on?"
The agent replied, "He just found a bomb!"