The Riddler: Hey Two-Face, show me how to punch a guy!
Two-Face: Oh, it's dead simple, my boy.
Two-Face: [demonstrates] Ball up the fist, reach way back, and assert yourself.
[knocks guard out with one punch]
The Riddler: Ohhhh, that looks like fun! Lemme try! *Lemme try!* Ball up the fist, reach way back, and assert your...
[hits guard with no effect and holds his hand in agony]
The Riddler: OW!
(Batman Forever)