Answer: HADACOW

AnswerCrossword Clue
HADACOWFreaked out la Bart Simpson
HADACOWWent ape, like Bart Simpson
HADACOWLost it
HADACOWGot upset on a farm?
HADACOWFreaked out
HADACOWLost one's cool
HADACOWGot upset with Bart Simpson?
HADACOWReally lost it
HADACOWReally overreacted
HADACOWGot plenty upset