Amazing that an innate hunting skill is so darn cute. The approach does not use stealth as we know it, but it relies on the fact that many pray animals rely on motion to detect threats and what the cat does is freeze when the pray is looking then taking a step or two when the pray turns away. They make use of cover where possible, but the real trick is knowing when to move and when to freeze. Cats are born with this skill and in spite of the violence that would be the end result in the wild the stalking approach of a cat is so darn cute.