Quick-thinking Serjeant Deacon Cutterham had just five seconds to plunge his arm into murky ditchwater, retrieve the high-explosive device and throw it to safety.
He and his patrol were wading through an irrigation ditch knee-deep in water in the Nahr-e-Saraj district of Helmand in Afghanistan on May 24 last year when the grenade landed in front of him.
Sjt Cutterham, from Bristol, said: "I heard the 'ching' of the fly-off lever coming off it. It all happened so fast but so slowly.
"I just went into autopilot. I shouted 'Get down, grenade', ran forward, grabbed it first time and just let go of it.
"I can't believe I didn't lose my fingers because as soon as I let go of it, it exploded. If I had missed it, it would have been game over." Read more on those receiving bravery medals.
More top news
Friday should start off nicely with lots of bright spells and only the odd shower. The afternoon will be warm with heavy rain in places
A beekeeper had to be called in to Bristol today as up to 20,000 bees chose to take up residence on a city centre lamp post
This adorable calf may be little but she is already a big success - becoming the newest member of one of the rarest species in captivity.