Punch-Punch-Punch Uh-Oh/Playing With

Basic Trope: No matter how many blows the hero delivers to the villain, he seems unharmed.
 * Straight: Bob, our hero, is punching David, our villain, with great power, but David seems unimpressed, even amused.
 * Exaggerated: Even with the most powerful Ki Attacks and Dangerous Forbidden Techniques, David, unharmed, says it tickles.
 * After Bob's punches fail, David punches Bob, realizing that it had as little effect as on him.
 * A bunch of hardcore Marines, heavily armed, open fire on David the Demigod, who either blocks it with an energy shield or is just plain Made of Iron. Cue David powering up a Ki Attack now that the Marines have emptied their clips...
 * Downplayed: Bob punches Dave who gets hurt but not much.
 * Justified: David is Made of Iron, or perhaps trained to ignore pain, or perhaps he's just flippin' insane.
 * Bob is extremely weak and stupidly overconfident.
 * Inverted: Bob attacks David with ridiculously weak punches, which David succumbs to as if he were given deadly blows.
 * Bob tries to attack Dave who dodges his blows easily.
 * Role Inverted: David delivers powerful blows to Bob, but Bob isn't phased and gives David the what-for.
 * Subverted: David seemingly shows no pain from those body blows of Bob's as he's about to attack back, but then he suddenly collapses from ruptured guts.
 * Bob punches David with great power, then quickly realizing that it's not going to work. He then pokes David's eyes out before David could punch back.
 * Double Subverted: David's faking the severity of his wounds to trick Bob into ceasing the attack, and then he'll give him an ultimatum.
 * Parodied: Bob practically kills David, but he comes back to life and says "Gotcha!".
 * Deconstructed: David takes the punches without flinching, but is later shown to have suffered severe internal damage offscreen.
 * Bob notices David isn't being hurt, and flees at the earliest opportunity. He comes back with a chainsaw.
 * Reconstructed: David does get hurt by Bob, but shows Determinator level willpower and turns the fight around.
 * Dave is not only tough but fast, he chases down Bob before he can get a weapon.
 * Zig Zagged: Both Bob and David can't hurt each other, and settle for more and more over the top attacks that do little more than destroy the scenery.
 * Averted: David is hurt by Bob's attacks.
 * Enforced: "We need to show that the villain is a threat. Let's have him withstand any of Bob's attacks."
 * Lampshaded: Bob: "Oh hell! That was my most powerful attack, and he just brushes it off!"
 * Invoked: Bob expects David to show no pain so he can continue to thrash him.
 * Defied: Bob keeps punching David until he's good and hurt.
 * Discussed: Bob: "I'm gonna have to use better attacks, I hear David's impervious to pain."
 * Conversed: "The villain's never hurt by stuff like that, he'll just wipe the floor with the hero afterwards."

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