He'd taken in the scene quickly and professionally. The amount of blood couldn't have come from Booth alone, not without him being dead. Suddenly the explosion comment was starting to make sense, although he didn't want to know who had exploded to contribute to this mess. Since he was armed, he assumed someone threatening, possibly demon. Which meant getting him out of there before something, or someone, happened along was first priority.
"Well, hang in there. You die in my truck, I'll bring you back and kill you again." Eliot took his phone out of his hand and slid it into his back pocket, then took the gun. Flipping the safety on, he tucked it in his belt. "Let's get you back to the complex." The hospital was probably the better idea, but the state he was in was likely to attract someone's attention and the last thing they needed was a discussion with the police and having to make up an excuse.
He shifted around so that he was crouched beside Booth. "If I give you something to lean on, do you think you can stand?"