When he reached the top, one of the target bunkers opened fire on him with machine guns. Yadav ran toward the hail of bullets, pitched a grenade in the window and killed everyone inside. By this point the second bunker had a clear shot and opened fire, so he ran at them, taking bullets while he did, and killed the four heavily-armed men inside with his bare hands.
Meanwhile, the remainder of his squad was standing at the top of the cliff staring at him saying, dude, holy shit! They then all went and took the third bunker with little trouble.
For his gallantry and sheer ballsiness, he was awarded the Param Vir Chakra, Indias highest military award. Unlike the Medal of Honor, the Param Vir Chakra is only given for rarest of the rare gallantry which is beyond the call of duty and which in normal life is considered impossible to do. Thats right, you actually have to break the laws of reality just to be eligible.