In 1978 the Skansen Zoo in Stockholm had a giant burglary problem… because a zoo is the first place any smart robber would look, right? To fix the situation they gave a king cobra the privilege of wandering outside its enclosure across zoo grounds each night. They stressed to the media that the 14-foot-long reptile was so poisonous that any intruder who was bitten would die within 15 minutes. No more break-ins occurred.