"They've worked against everything we've worked so hard to build, and they don't care who gets hurt in the process. Make no mistake, they're the

enemy, and they won't stop until we're all destroyed."

it means that the hockey puck was traveling very fast.

mark twain, real name samuel langhorne clemens, was an american writer, humorist, entrepreneur, publisher, and lecturer. among his novels are the adventures of tom sawyer and its sequel, the adventures of huckleberry finn, the latter often called "the great american novel". wikipedia