Werewolf senses had some merits; the back of his neck began to prickle. Remus turned around and promptly froze in horror. Severus was standing in the doorway.

"Severus… Erm… I can explain this…"

One black eyebrow went up. Remus cringed a bit.

"You see, I was…" But he stopped.

He'd been caught. Red-handed. There was no hiding it. He couldn't believe he'd forgotten to close the door…

Severus started to laugh and Remus wondered if his ears could catch fire.

"Oh shut up!" He muttered, relaxing the posture he'd been caught in and switching off the music.

Severus smirked in amusement. "Air-guitaring? Honestly Remus…"