I'm kinda expecting Shiro's humor to backfire on him. Like it's all fun and games until you're on the other end of things, listening to one of your own try to comfort you with black humor in what may be their last moments. Bonus thought: it's Keith throwing back the 'if I don't make it' line because he thinks it's hilarious and clever.
“Keith. Keith, buddy, I need you to open your eyes for me, okay? C’mon, you can do it, just open up.”
Keith’s brows twitched, and there was a long moment where it looked like he’d passed out again. Then his eyes opened. “Hey. Ow.”
Cracking a smile, Shiro bent over Keith, like he was trying to physically shield him from danger. Not that there was anything to protect him from. When Keith had been hit, Shiro had pulled him into the Black Lion until the rest of the team could arrive, and he was directing so much energy into the shields that Shiro wasn’t sure they could have moved if they needed to.
Maybe it was a bad strategy, but Shiro couldn’t help it. Everything in him needed to keep Keith safe, no matter what that meant. When the rest arrived, he’d go back to being reasonable. Right now, he was going to help Keith.