I used to know someone who had been awarded the Military Medal in Korea. Then it was MM for other ranks and Military Cross for officers. Now it's Military Cross for all ranks.
It was awarded for taking out two Chinese machine gun positions single handed. Didn't mean to, it was just that as he described it, 'I was rushing the position with my section and suddenly to my horror I could only hear the noise of my own boots on the hard ground'. They hadn't followed me. He continued, 'I wondered what was best to do, carry on or run back'. He decided to continue, throwing a grenade at one MG and spraying the other position with his sub mg (Probably sterling).
As you know, you can't throw a hand grenade (Mills Bomb) of WWII type far enough without being in the splinters area. He spent a year in hospital in Japan and was still suffering in the 1980's.