Mifune drinks hard, yells, and he is the coach of the losers.  His methods are ancient and he pushes the campers to the mental and physical limit.  But there may be a method to his madness.
Don't talk to me if you've 
got nothing to say.
Si no tienes nada conmigo, no me hables.
No vengas a molestarme si luego no quieres nada.
Se não tem nada a dizer,
 não fale comigo.