Plenty of boring nights in the UFC have changed in an instant with a spectacular knockout.
Although fans have always craved submissions, there's nothing quite as compelling or aesthetically alluring as a knockout.
Since the company's inception in 1993, UFC fighters have pulled off artistic and brutal versions of this fight-ending maneuver.
Some chose to deliver the blow with a knee or a fist, while others used an elbow, a foot or a shin to get the job done.
Regardless of their modus operandi, the fighters on this countdown delivered prolific and violent knockouts that altered the sport forever.
Here's a look at the best knockout from each weight class in UFC history.