...pay a highway toll for the person behind you? I only go through a $1 toll twice a week when I visit my mom and I almost always pay for the person behind me (sometimes multiple people behind me). This is something I learned from my dad. He does it whenever he can as well. It doesn't seem to shock the toll booth workers in NH anymore, but you wouldn't believe the look of surprise I got when I did this while passing through a toll in IL. He couldn't believe I was paying a toll for someone I didn't know.
Have you or would you ever do this?