2. The Good, The Bad, And The Ugly - Mexican Standoff
Sometimes, a gunfight doesn't involve dozens of bad guys and a lone warrior, some of the best scenes throughout all of cinema have involved two or three people facing off against one another.
The Good, The Bad, And The Ugly had no fear of killing off characters. 220 bodies stacked up throughout the movie, but none were as important as the final shootout between the titular characters in what has become the best example of a "Mexican Standoff" in all of cinema.
The standoff is incredibly intense as all three characters stand in opposition of one another. Each man is in a position where he can kill the other, but that means no man can survive the fight. This was the no-win situation that couldn't end without each man getting killed... but that's not how it played out.
When they finally face off with one another, more than five minutes pass. That's a long time to build up to a single event. The focus on each character's eyes only ramps up the tension until Clint Eastwood's Blondie shoots Angel Eyes. Not only does he take out the bad guy, the body falls into a grave.