"It's Marco, dude, let me in. Are you alone?" A pause, as he realized how that sounded. "I'm not coming on to you so keep your pants on."

He fidgeted with the cold pizza box while he waited to be let in, and wondered if this was really the best idea. They were on the same team, right? Arthur raised all of his paranoia flags (though, to be fair, very few things didn't) for reasons he couldn't figure out, and just standing in front of the door made him antsy.

Then again, backup would be nice. A sanity check would be nice. And he did offer his help before.