You know what the funniest thing is? When you open a door, and somebody is standing on the other side, preparing to open the door themselves. The manner in which I open doors, makes for some pretty pissed off people. Either I open the door forward, and pretty much slam them on the floor by the force of my door opening, or else I open the door backwards, and they stumble in, with limbs flailing all over the place. At this point, I cough to cover up my chuckle, and hustle out through the door, leaving the victimized party reeling in my aftermath. Uh....yeah, anyways, I think that's sort of funny. I even laugh when it happens to me. I wonder what would happen if two particularly violent guys got to a door at the same time, and one pulled, and the other pushed. The door may be in danger of coming off its hinges.
This is why doors should be all glass. That would solve this problem. However, it would create problems of its own. For instance, how many people have walked into a glass door? I have, numerous times. And I've seen other people do it, so it's not just me. How about this one? You know those sliding glass doors? Like, they slide sideways. I once walked into one and knocked it off its track. That sucked.