With friends like these... who needs enemies? Drone footage from a trench battle in Ukraine shows a Russian soldier accidentally kill his buddy as he fires a rocket propelled grenade which sends the powerful back blast directly into his comrade's face.

Standard procedure in the US military is to check your back blast area while verbally announcing your intent to fire the weapon. There is likely a similar procedure in the Russian military, however this soldier was either poorly trained or too caught up in the moment to ensure he wasn't endangering his fellow soldiers.