1 - War
War sucks because it means that people are unwilling to compromise without killing each other. Usually when I have a disagreement that I can't win, I give in, although with a terrible lack of grace, and I'm bitter about it basically forever. Still, no loss of life there. I wish that nation-scale conflicts could be solved without death.
2 - Falling down
I don't have a link for that one, I just tripped this morning on the way to the car, and that sucked. It sucked a lot. I'm not broken, just bruised, but I think I'm going to hold a grudge against the piece of plastic I tripped on forever. Forever! You're dead to me, wedge-shaped dark gray piece of plastic that someone left lying on the ground by the curb!