Alright, on top of the guilt and alarm, Ford can feel the tiniest bit of frustration start to grow. Stan has every reason to respond the way he does, Ford can't fault him for that, but his panicky terror is really not helping the situation at all. But then, Ford supposes he would probably be scared shitless too if Stan were the one bleeding out all over his bathroom.

"Stanley, for godsakes just hand me the damn cauter!"

He means to sound firm, demanding, but more than anything he sounds tired - which he is. God, but is he tired. It probably isn't the best condition for him to be wielding what amounts to a surgical soldering iron, but it can't really be helped. He's not about to ask Stanley to do it for him, hell no. The poor bastard is traumatized enough as it is without adding "searing his brother's head closed" to the long list of Bullshit he's had to deal with since coming here.