It should be immediately obvious that something’s wrong. The way Steve reacts — the way he practically freezes when he hears Dick’s voice — is so different from Steve’s normal friendly hellos.

There’s a flash of danger in his eyes as he turns to face Dick. Even now, when doesn’t remember him, he can still see that he’s a kid, and he was relaxed in that chair a moment ago.

“Who are you.” A demand more than a question, as Steve slowly starts to walk his way, on the lookout for anything he could grab as a weapon on his way there. There’s a few possible candidates.