As an actor and teacher of modern day and age medium-film & Tv

Unlike the old days when you could take all morning to getting back into your character or building up the anger;  we don't have that kind of time or patients.  As an actor of modern day and not in the theatre of acting, I know that if I am going to work in TV and FILM, then I need to be able to access my emotions quickly, and in a controlled way because of filming.   In that case, I can't use past events or issues that I myself have not dealt with because their is no control.  We must be able to move on to the next scene.  I don't mind if you stay in character all day, but you need to be able to control your emotions.  If we loose you for 20 minutes because you brought up an issues for you and can't stop crying; then you just cost production a crap load of money. If your in a play or in class, then yes feel free to ball your eyes out because if its going to let you deal with it in class instead of on set then by all means let it out.  Class is a free space to try anything, if you never fail horribly then you haven't taken enough risk to be great!