Monkeys smart, yet stupid

A very bright group of Japanese research monkeys – no, not the scientists, the brachiators – escaped from their enclosure to the amazement of observing research monkeys – no, not the brachiators, the scientists – by using tree limbs to catapult themselves over a 5 meter high electrified fence. The escapees were soon recaptured, however, "by luring them with peanuts." So smart, yet so dumb.