Minor Pet Peeve 

Have you ever gone somewhere and maybe held the door for the next couple of people coming in right behind you? Have you ever had them still hold the door on their own as they went through, or push it a little, as if to make sure it's really open? Here I am, holding the door, trying to be a nice guy. You don't trust me? Do I not look like someone capable of holding a door that you need to participate? Does this look like a strenuous act, that you need to add some extra muscle to the exercise?

If you're one of these people, just walk through, have a little trust in your fellow human being, and thank that person. And if they do close the door on you, feel free to deck them. :)