For starters, don’t run. Running makes you look like prey, which is the last thing you want. Besides, mountain lions can bound up to 40 feet when running, leap 15 feet, climb trees, and sprint up to 50 miles per hour—you won’t outrun one. Not even Usain Bolt, the greatest sprinter ever, could. Your best chance to escape unscathed from such an encounter is to stand your ground and make yourself look as big and formidable as possible, maintain eye contact with the animal, speak loudly and firmly at it, and slowly back away.