1 Usually (but not always) the pain is so bad, that you are not able to walk. Broken bones in the toes cause less pain, and you may be able to walk with a broken toe.  Bruising of the foot with a broken bone is also common.
Perks definition, to become lively, cheerful, or vigorous, as after depression or sickness (usually followed by up): The patients all perked up when we played the piano for them. See more. Dictionary.com
In Fallout 3, Perks are bonuses of varying kinds that are earned after you successfully attain a new level. Each level you earn will not only allow you to dump skill points into your various skills, but will also allow you to choose an available Perk from the list given.