Some may think you should pull the pin before throwing the grenade in.
You are wrong.
As vatniks have shown, they're scared shitless and will scatter if they even feel like a grenade is near them.
Thus, throwing the grenade without pulling the pin will allow you to pick it up once the orks have ran for the woods and use it on the next trench, repeat ad infinitum
She's a repacker, she takes cracked games and repacks them into way smaller downloads, think 20Gb download for a 60Gb game.