McDonald's drive-thru, 12:05pm.  I'm two cars back from the window for literally 10 minutes.  Because of the curve, I can see the lady in her car that's causing the holdup.  Finally there's some payment exchanged and then the lady points over shoulder at the car in from of me.  More payment, and the lady pulls forward.  
  
Car in fron of me pulls up and the worker waives off the person in this car and points at the first car.  Well the person in the second car points over at me and they exchange payment.  
  
My turn.  "She bought yours."  I'm about to tell him I'd like to buy the person behind me's meal.  Or at least $8 towards it since that was my total.  I figure I was prepared to pay $8, so no big deal.  But I don't say that.  I was prepared to pay for my own, and so is the car behind me, right?  And that's gotta be annoying for the worker to keep telling people, right?  So I just say "Oh, ok then."  And I pull forward to collect my free lunch.  
  
Then I eat my free burger and fries on the way to Goodwill.  Thought I'd poke around for some shirts before I go back to the office.  No luck on the shirts, but they DO have a quesadilla maker.  It's $9.  
  
So am I an asshole for using that free lunch money to buy a quesadilla maker instead of paying it forward to all the other people in the drive thru line who also had to wait?