Concussion
From Salem Wiki
Concussion
A 
Concussion is received when getting hit by an object fired from a 
Catapult or 
Long Range Mortar. A Concussion your maximum Black Bile and prevents you from logging out or Sleeping. Different objects fired from them each have a different severity, additionally your Concussion can stack, so getting hit multiple times will increase the severity, and therefore the length, of your Concussion as well as the amount of Black Bile you lost. Concussions will go away on there own relative to the severity of the Concussion.
CAUTION: You cannot log out or go to Sleep while Concussed.
