A nice trolley driver
Michael thanks the C-Line driver who saw him on the other side of the tracks after she'd just closed the doors and, instead of just going, re-opened the doors and gestured for him to board the train:
... When we got to Copley Square, I made a point of thanking her again for picking me up when she didn't have to. And now I'm thanking her publicly. She made my day start a little nicer; I certainly hope her day is nice in return.