Remember the old philosophical paradox that asks "What happens when an irresistible force meets an immovable object?" Well, this is just a guess, but my answer to the question would be Comic Book Clash Covers!
"What's a Comic Book Clash Cover?", you ask? Let's break it down:
1. Clash Covers always feature two opposing teams barreling toward each other at top speed.
2. The best Clash Covers usually freeze-frame the action a split second before the earth-shaking impact.
3. More often than not, the design of the cover is highly symmetrical, as combatants rushing in from stage left have a corresponding combatant speeding toward them from stage right.
4. The first and most common type of Clash Cover is the age-old conflict of superheroes vs. supervillains with its primal good vs. evil appeal (click on each cover for a better look):
5. A second and surprisingly common type of Clash Cover features two teams of good guys ready to smash each other to a pulp, which amps up the already crazy levels of drama by prompting the viewer to wonder "Why the heck are the good guys fighting each other?"
6. The third variety of Clash Cover also happens to be my favorite. In this case, the warring sides are different versions of the same team of superheroes, such as when the current lineup of a super-team battles its original lineup. In addition to the basic drama of opposing sides about to collide, beyond the added drama of good guys battling each other, this third category knocks the drama quotient out of the park with its undercurrents of "old vs. new" generational competition and intramural resentment.
7. A tiny percentage of Clash Covers defy all classification, as demonstrated by the cover of Justice League #132 (1976).
Thankfully, clashes between superheroes and weapon-toting zoo animals are incredibly rare (I believe this is the only one), making the vast majority of Clash Covers a slam-dunk addition to Simply the Best!