Remus released his grip as soon as Harry nodded and sat back on his heels for a moment until he was sure his friend was breathing easily.
He hadn't expected to have to fight himself as well as Harry when he planned that last move. Something about the struggle that followed had brought out more than a friendly competitive urge, however, and he didn't have time to shove it back down again. Not understanding why Harry was still clutching his wand so tightly and thinking perhaps he expected Remus to pull another trick, Remus stood and made his way to where his own wand lay.
That was when Regulus' voice could be heard over the crowd, causing Remus to groan in dismay before stooping to jam his wand back into it's holster and turning to address his lover's complaints with the demonstration.