In a world where medication was scarce, and most of the people who knew how to produce it were either wandering the streets as corpses or had long since been consumed by said preambulating corpses, Marcus actually approved of being stingy with what they had. He didn't think a full grown man should have to be numbed before a simple stitch. He didn't feel like limited resources should be wasted on minor injuries. He thought it was a grievous abuse of a doctor's time when they were bothered to do basic care needs, especially when the Sing Sing infirmary had enough volunteer staff to spread that work around.
However, he fucking hated surgeons. They often developed god complexes, which easily set them on a path of true, unabashed assholery. Deep down, he was certain that people were put under before a surgery simply so that they wouldn't be subjected to the abrasive, dickish personalities of the majority of surgeons. It had nothing to do with pain or trauma mitigation whatsoever.
Luckily, back when he'd worked the hospital Marcus hadn't really been forced to deal with them often. Certainly not directly. Now, though, there was one in the infirmary. He couldn't figure out why, though he suspected that the guy was just feeling bored and useless... at least, Marcus was willing to believe that when he wasn't nurturing a personal conspiracy theory that this asshole just showed up deliberately to piss him off and torment others. There were other medics on hand. Other people who knew first aid for the small stuff. It bothered Marcus that this guy subjected others to his attitude for no good reason. Well, namely it bothered Marcus that he had to be subjected to it.
So the pat on his shoulder earned the surgeon a very hot glare from the six and a half foot tall man, coupled with a derisive snort. The job came first, though, so Marcus did see to the kid. Jude was right after all; basic first aid was something Marcus was qualified to do. A bruise from a paintball warranted little more than an icepack, and was beneath the notice of even a primary doctor, like Wren. Wren might have given the child an anti-inflammatory, but Wren was free with those. Marcus just sent the kid off with an ice pack and advice on how to not make his ass a fucking target. It didn't even take a lot of time out of his day.
That wasn't going to stop Marcus from confronting the surgeon over it, of course. There was the principle to consider. After the kid was gone, he went looking for the man. Since Jude had set the tone first by patting Marcus on the shoulder, the larger man had absolutely no qualms getting up in the surgeon's personal space. Marcus specifically waited to corner Jude by a wall, so that the smaller man would be forced by necessity to look up at him. When he spoke, it was in a low growl. "Listen, pendejo, I'm gonna speak real fucking slow so the words sink in: you're not my fucking boss. You're not doing nobody no favors being here. You being an asshole to patients is one thing, but you're gonna want to watch your fucking tone when you talk to me. I'm not impressed with your shit."