For most people, just a bad angle (or some uneven ground) can make small falls hurt sometimes.  But when you're a fatty you have no muscle and only shitty joints to absorb part of the impact so it will always hurt. And when you're a fatty, you're not used to be anywhere else than in your bed/chair so high physical pain is not something you really experienced and adjusted to (besides the constant pain from being alive in such a shitty body, but that's constant) . So when you get hurt (i.e everytime) it hurts even more. And since you're a fatty, you can only react to this like a 4yo and start crying so the help you're entitled to knows it's time to show up.