Stan Manly Challenge #2

This Stan Manly Challenge is to do something extra for which you will get no credit.

This means that you have to do something nice without anyone finding out. It can't be the dishes or laundry or something that the person receiving the favor knows it is you, but just do something kind for another person completely anonymously.

Some ideas:
Pay for someone's meal from across the restaurant.
Pay for the next 5 people at a parking garage.
Pick up a mess left by some careless people on a picnic.
Let someone into your lane of traffic who has been trying to turn in for a while.
Clean up a mess that only you know about around the house.
Mow a lawn, rake some leave, scoop some snow - whatever the case is for a neighbor and do a better job than you do on your own lot.