He still hated the floo. It still made him dizzy, and still, after all these years, Harry feared stepping out of the wrong fireplace. Considering his current situation, there was no telling how that would turn out. Harry didn't step out of the fireplace immediately; he grabbed the brick instead, and opened his eyes, fearful, once again, that he had the wrong house, but there Draco was, with a finger over his lips. Relieved and annoyed, Harry stepped out and dusted the ashes from his trousers.
Without speaking (because, after all, Draco was telling him to be quiet and there was no telling how quiet Draco wanted him to be), Harry spread his arms out to his side in the international sign for 'here I am'. It looked a lot like 'take your best shot', which wasn't completely inaccurate, either.