I pushed through the first set of absurdly heavy library doors and glanced over my shoulder to see if anyone was behind me. A man was, so I paused and held the door for him.
Him: Thank you. And now you have to let me. *scurries past* *pushes next door open* *waves me through*
Me: Why, thank you.
Him: One good turn deserves another.
The clichéd statement has never felt so genuine or warm. Who knew opening doors would be such a pleasant way to pass the evening?