> If it follows, stop moving.
and then what!?
That's when you play dead, to get used to how you'll be in a minute.
Realistically, it is a game of chicken. If you stop, you're signaling to the bear that you aren't intimidated. As long as it has an escape route, it'll back down.
If there aren't cubs around, you yell, clap and raise your arms. It'll run in a heartbeat. If there are cubs around, you back away slowly- running will just make it chase you. If it follows, stop moving.