"Excuse me, can I borrow your lighter?" you asked a strange man who was standing on the pavement in the middle of the night. He had a balaclava with a skull on his face, and a smoldering cigarette between his lips.

He took the lighter out of his pocket and checked it, but, alas, there was no fire. "I have an idea..." you came closer to the man, raised your head and lit your cigarette with his cigarette. Pulling away, you smiled and gave out, "Thank you, you saved me".