Guilliman looked over the throng of people gathered before him, eyeing them with an annoyed glare.
"You are sure you will not join the Imperium of Man?" Guilliman asked.
"Positive" replied Ozpin.
"Very well then." Guilliman picked up the rock at his feet, and threw it as hard as he could at the leg joint of a Paladin. The rock slammed into a delicate piece of machinery, causing the Paladin to fall over and fire off its arm-mounted cannons. The shot tore through the wing of a passing Bullhead, which proceeded to crash into a power station, causing a explosion which sent a piece of shrapnel flying through the air, which then slammed into the eye of a Atlas soldier piloting one of the Atlas airships, which then slammed into another ship, which then caused a domino reaction that lead to everyone except Ozpin, Guilliman and Glynda being crushed by the sheer weight, at least until a body slid out of the bridge of the airship that Glynda was desperately struggling to hold up with her telekinesis, which then fell on her and caused her to lose focus, leading the battleship to crush her. Ozpin fell to his knees, and didn't even rise when Guilliman read out a list of crimes mostly along the lines of "you didn't submit to us, so we're going to kill you" and then loped his head off.
The Dark Angels looked out over the devastation with faces of utter fucking confusion.
"How the hell did he do that?"
"HOW THE HELL DID WE EVER LOSE?"
Oh yeah, its one of THESE stories.