Everyone knows not to upset a pregnant woman. Even if you don't know, you should be able to deduce from the state that woman is in that you need to be extra careful around her. It's a common thing in many species, not just humans, that a pregnant mama-to-be will mess you up if you cross her. A very real example is this Reddit story . This mom-to-be was pregnant in the height of heat during the summer days. She had a designated parking spot in front of her townhouse so she wouldn't have to walk…