I was in the Gryffindor Common Room, finishing up my Transfiguration essay when I had a sudden, startling realization.

"My feet are cold." I announced, and James turned to me.

"Cold?" he asked, brown eyes widening.

"Very."

"I see." he said, and whipped his wand at my feet which spontaneously burst into flames.

"Oh. Thanks. They're quite warm now." I responded.

"You're welcome."