berserk (suomeksi)

berserkki (s: a crazed Norse warrior who fought in a frenzy)
hullu (a: injuriously, maniacally, or furiously violent or out of control)
sekopäinen (a: injuriously, maniacally, or furiously violent or out of control)
raivopäinen (a: injuriously, maniacally, or furiously violent or out of control)