Severus had turned his attention away from Lucius only to find Potter was no longer standing where he had been moments before. Frowning, his eyes searched the room, only to find Potter leaning against a wall in the shadows.
"Excuse me, Lucius," he murmured.
He made his way to the outskirts of the crowd, then made a beeline for Potter. Harry's eyes were still closed when Severus reached him.