Every-so-often, I will pretend that I know that hell I'm doing when it comes to auto repair, just to prove that I can do something. So, I decided I would change the oil in my car. How hard could it be, right? 

Drain the old stuff into a container, replace the filter, pour the new stuff in.  Sure. Great.

Well, what sucks is when you forget to screw the drain pan plug back in before adding new oil, and you've already removed the container under your car...