There was something oddly discomforting about standing still with a wand pointed straight at his face but despite the awkward feeling of it all, Sirius couldn't keep the smile from his face. It kept on creeping back despite his best efforts to maintain a straight face until he was giggling and swaying a bit.
"Come on, Gids.. if you take my nose off I'm going to kill you... " He reached up to push his roguish hair out of his face and grinned again, his eyes un-focusing briefly and forcing him to shake his head to snap out of it. That was a bad idea, it threw off Sirius's balance and he stumbled again, bursting into laughter as he doubled over, hands in the dirt and effectively fell.
He lay face down in the dirt, snickering stupidly to himself before rolling over to look up at Gideon.