It was a good thing Marco had already started morphing and was just about finished, because getting caught mid-morph would not have been good.

As far as he was concerned though, the fact that Sirius was still going along with his idiotic plan to kill himself was definitely not at all good. <You idiot, what did I say about not trying to kill yourself?> he yelled at Sirius. It didn't stop him from moving around to get behind the Basilisk though, swearing all the while.