Chuck Norris doesn't turn on his shower, he just stares at it until it cries.
Chuck Norris's Shower
Explanation
Explain Bear
Listen up, Daddy, you probably still need help tying your shoelaces. You see, the joke plays on Chuck Norris's reputation as an unstoppable force of nature, using hyperbole to show that he's so tough he doesn't need to turn on a shower; it just starts itself because it's afraid of him. Like, water cries, dude! Get it?
Meh
He takes bloodbaths not showers.