Sirius still had his wand pointed at the robot as it opened up and from it came...

A little green alien.

Sirius stared. The whole time the green man advanced on them he stared. And he kept staring as the man insulted them in both English and some alien language.

He lowered his wand. Stared for several seconds longer, and then he let out a laugh that sounded like a bark.

"Thank you." He said. "Thank you for making it official."

He turned around toward the others, lifted his arms into the air, and loudly proclaimed. "I am insane."