10. Killmonger Doesn't Confirm T'Challa's Death - Black Panther
For Black Panther's first two acts, practically everything goes right for the villainous Erik Killmonger (Michael B. Jordan).
He insinuates his way into Wakanda by offering up the body of Ulysses Klaue (Andy Serkis), who he himself killed, before revealing his true identity as T'Challa's (Chadwick Boseman) cousin N'Jadaka and challenging him to a fight for the throne.
Killmonger then kills T'Challa's confidante Zuri (Forest Whitaker) and easily defeats T'Challa in the ensuing fight, but rather than snap his neck or stab him to death, he makes the conscious - and idiotic - decision to throw him off the edge of the waterfall instead.
Sure, you can argue that T'Challa's prospects of survival were incredibly slim, but is it really expecting too much of a guy called Killmonger, who marks his body to count his confirmed kills no less, to confirm the damn kill?
As a result, T'Challa is able to rest up and return for a rematch at the end of the movie, leading to Killmonger's demise. All because he made the baffling decision to toss his cousin overboard rather than kill him in front of everyone.
Granted, director Ryan Coogler probably could've staged the scene a little differently to make Killmonger look like less of an idiot, like have T'Challa fall over the edge by accident during their fight.
Instead, it's an oddly dopey move from one of the MCU's smartest antagonists to date.