As you can see, bruise does not have arms nor legs nor anything else by which it moves forward. Bruises are heavy creatures that defy the rules of friction and barriers. Once set in motion, they bounce around and hit people. Their impact areas first turn red, then blue, blackish, greenish, finally yellow. And they moderately hurt.
How to fight it
Be carefull, where you walk. Bruises are good at disguise. They try to make you feel guilty for the bruise. If they do not get a chance to hit you without you noticing that they were the cause, they will stay away.gab