Ludo exited the firing room used for Transfiguration and walked out into the sixth floor corridor. It felt late...the light outside was dimming. He felt he really should head to dinner before all the food was gone.
"If it's even possible for the residents of Hogwarts to consume that much..." he thought.

He walked along the hall, keeping to the lighted areas of floor close to the walls, under the torches mouted above. As he walked, Ludo had the urge to stretch his arms out. He did...and his right hand came contacted with something solid...hard.
"OW!" he said, lettling loose a foul word or two and sucking on his fist. He looked around, hoping no one caught that.

Looking around for whatever he'd hit, Ludo stared. It was a portrait. A dragon asleep and the school motto written around it. But curiously...it was not the portrait frame he'd hit...but a handle. "Weird. This is very out of place." he thought, rather obviously.

This was too good to turn away from. Ludo stepped up to the portrait and pulled on the handle. Easy enough, it swung forward. Giving a slight gasp, Ludo stepped carefully inside, letting the portrait-door close silently behind him.