Cycling's not all muscular agony and festering, road silt-infested wounds.
One day you'll show someone how to use their bell, or how to stop that brake from rubbing, or even something as tricky as where a good bike path is, and they will fawn all over you, touch your on the arm, take your photo, tweet how awesome you are, facebook-friend you and nominate you to the local paper in their Suburban Heroes section.
BONUS TIP: Do not try to say it was nothing. Tomorrow at work your boss will probably fire you for coming up with an efficiency improvement that could make the company millions. Take the good while you can.