(1)Of course it is not free from those influences, but they are just influences - they do not fully determine my choice.
(2)It is our freedom to think which gives us the power to choose. We have the power to guide our own thoughts.
(3)Throwing a brick is a deliberate act. It can't be done unconsciously.
(4)I am fully aware of my wants and desires - they are not confined to my subconscious.
(1)In which case you are not fully free, your choice will be determined by a selection from a flow of thoughts.
(2)In which case you are not free from thought and your will is determined by thought processes which could be logical or illogical, rational or irrational.
(3)It can be a deliberate act, just like throwing a cricket ball with intention in a cricket match. However you described your action as impulsive which suggests a subconscious emotional motive over which you had no conscious control. You were impelled.
(4)So, on the particular occasion in question, you were aware of your desire to throw a brick at your friend. Why did you desire to do that?