What can I do if I am a female who feels she was falsely imprisoned at work by a male manager?

I would need more information but if he just made a pass at you that is not illegal. If he prevented you from leaving the room it's false imprisonment. Do you really want to press charges over this type of incident? Is it worth the time and trouble? Were you hurt or just upset? Do you want to lose your job and have it on your employment history? Consider the consequences of your action and talk to an attorney to give him all the facts before you do anything, and make sure you tell he truth and not exaggerate.

Call the police and see an attorney about a lawsuit.

You may go see the prosecuting attorney, likely the County District Attorney and see if this conduct in fact is false imprisonment. You could also speak with his/her manager and/or Human Resources.

File a complaint with HR or the EEOC.

I don't understand this question. There are two problems here (one that probably cannot ever be properly addressed in this format; you may have to see an attorney in your area). First, I don't understand what you want; any attorney should determine the goals that a client wishes to seek. Are you looking to report criminal activity OR are you looking to sue? If you are looking for an arrest, you should contact the police. Attorneys will not be able to help you with this. Second, I don't understand what happened and don't think that you will ever explain this sufficiently here - there are limits to how you can describe this event. You should try to talk to an attorney in your area. If you are looking for a lawsuit, you should not talk to criminal attorneys. You should talk to attorneys who specialize in claims involving work or personal matters.

Depending on the situation, you would contact either your employer's human resources or upper management or possibly even the police.