I have seen a documentary about those bees! The natives climb the cliff and light a fire below it. The smoke calms the bees as they rappel down and collect the hallucinatory honey.
In the spring, this honey contains a rare substance from rhododendron flowers called grayanotoxin. It’s known for its intoxicating effects, giving it a reputation as an aphrodisiac, a powerful medicine, a hallucinogenic drug, and (on a far less positive note) a poison.
Read more here: http://www.realclearlife.com/food-drink/nepals-hallucinatory-honey/