I was about to type exactly what Nanuk said but then I saw his post. You need to bring the gun up close to your body while you have your index finger pointed along the frame of the gun above the trigger. Then punch the gun out at head level. Before you do this just remember this mantra, slow is smooth, and smooth is fast. Say it before you draw and practice it, slow is smooth, and smooth is fast.
"We have repeatedly held that one who is unlawfully assaulted and put in apparent danger of his life or of great bodily harm need not attempt to escape but may repel force with force..." PEOPLE v. BUSH
414 Ill. 441 (1953)
Supreme Court of Illinois.