"What...?" Robin wheezes like a petulant child, "Get off of me."

Phalanx can feel Vincent shifting around--but not because he's moving. It's just Robin twisting around underneath him, trying to wriggle out from under his massive friend.

"Sorry, can't." That's when Vincent breaks into a rare grin. "Kid's getting comfy."

Okay, so maybe he is kind of having fun torturing Robin a little in the process of waking him up. Maybe he's just always wanted to smush him, in the way that you kind of want to smush annoying bugs.