Let's retrace our steps. First, Soap, the poor bastard, had gotten himself shot and mildly blown up, and it was bad enough that he'd needed to go to the civilian hospital. You and Simon knew he'd be going stir crazy, so you were on your way to visit him. Were being the key word.

At some point between the door, reception, and the Sargent's room, you'd lost Simon. He'd always had a bit of a habit of wandering off, quiet as his call sign, so you weren't too worried.

What did worry the nurses, was the way he pressed into the window overlooking the NICU like a kid ogling a toy shop. Which is how you found him.