Alfred: Why bats, Master Wayne?
Bruce Wayne: Bats frighten me. It's time my enemies shared my dread.
When Bruce is thrown off the truck when released from prison, you can see his bag in the background as he rolls at least 5 feet away to his right. When the angle changes and he's getting up, the bag is right in front of him, if not slightly to his left.
Some people wanted the Batmobile to be computer generated, but director Christopher Nolan refused, so it was built from scratch. It can do 0-60 in 6 seconds.