You were in the car, headed to the store when traffic hit. So to cure your boredom you put your hand out the window.

some guy on a motorcycle stopped next to your car and grabbed your hand

“Put your hand back in the car miss…” he turned forward, his eyes still on you “It’s dangerous”

You put your hand back in once he drove off, there was a note inside, with his number and name, Jake, on it

Later you went to the library and there he was, at the check out getting a book.