The Battle of the Tenaru River/Battle of Alligator Creek qualifies as this.
Basilone holding the line by using a 33-pound crew served machine gun as a personal weapon to hold off a Japanese attack in Part 2. Since the gun was designed to be fired with a tripod, he ended up getting second-degree burns on his hand and arm while holding it, since it lacked the grips to be used in this manner and he'd lost the arm-mitten that crews use to insulate the heat while moving the gun.
What's more, his comrades are just dumbstruck he's holding the line by himself; the only sound of gunfire at that moment is the one from Basilone's machine gun.
Of course, it's what got him the Medal of Honor.
Let's keep in mind that the series actually down-played what this guy did to keep the episode from going too long. In Real Life Basilone held his position for THREE DAYS. No food and no sleep. And he did it while running back and forth between several different positions because all of the gun crews had been killed.
This troper nominates Basilones' actions on the first day of Iwo Jima, too.