A question about etiquette ...What to expect for a day of helping people?

you did the right thing, sometimes stuff like that does come back around to you in a positive way, ask him for a helping hand someday, even if its just a hold here job, that will be your answer to helping him again, some people need to be pushed into doing the right thing, if its just laziness, the tom saywer trick, or plain ignorance of the matter at hand.