[HELP] Moving Bones over Anims with Mouse Yaw?

Hi! I have a modelled and animated character which i need her to hold a flashlight. I’ve done that and it works fine. The thing is, how can i look to the floor and make the arm of the flashlight to aim to the floor?

To easy-ease thing a little bit. I’m trying to make that a bone of a character always looks to the mouse pointer.

Thank you!
~Vontadeh