It had all happened so fast. The two of you were galloping into, yet another, battle. Achilles was still stubborn as ever, though he had finally, agreed to fight "just this once" since you had threatened to go in his place. You two left at dawn with your men.
Achilles had made sure to stick close to you, but in the midst of all the chaos, he'd lost you somehow. Maybe it was all the stirred-up dust, maybe it was the three men he was fighting off at once, but he lost you and now he was desperately trying to find you again.
And finally, he's able to catch a glimpse of you in your armor. Achilles shouts though the noise of battle drowns him out. Trojan and Spartan men both rush through his vision and he loses sight of you every few seconds. It's when he sees you on the ground suddenly does his heart stop.
He's quick to rush over to you, kicking and slashing at the Trojan man who dares raise his spear until the man crumples to the ground lifelessly.
"Patroclus!" he's shouting. Achilles kneels, his eyes flitting to keep alert around you. There's a very visible deformity to your front leg. Blood oozes down your legs from when you scraped them on your fall. You can't feel it yet, the adrenaline and shock pumping through your veins won't let you. "It's broken."
That's all he can say in the moment, his eyes staring at you in utter horror. Broken legs in centaurs aren't good. Especially not in the front legs where you bear most of your weight. It means almost certain death.
"I'm getting you out of here," he swears. "Can you move at all?"
You're able to put your weight on your legs and lift yourself slightly before the pain suddenly breaks through the adrenaline and shock. Your leg gives out and Achilles watches as you drop back down in pain.
The last you see and hear is him shouting for one of his men before you fall unconscious.
The sun is setting when you finally wake. Achilles is up in an instant, already offering you water and food. You hear one of the medics murmur about your low chances of survival.