It’s not any snake, but some species that are adapted to living on trees. It’s also not really flying. Gliding would describe what they do better. As they jump, they flatten their body and make slither movements through the air, gliding maybe at a 45 angle downwards.
I recently read somewhere that it’s actually just very few bee species that die after stinging, among them honeybees. They have a barbed stinger that gets stuck while most bees have flat stingers and can sting repeatedly.