His Piscean need for self-sacrifice is important here. Along the way, Bruce draws some fire on his own, but he always manages to extract himself, and have a little fun humiliating the bad guys in the process. Although he's certainly strong physically, Bruce is no Arnold. He must depend on his wits to defeat the bad guys. Fortunately, his Mercury-ruled Ascendant, Virgo, allows him to do just that.
Mercury governs the mind and intellect.
Bruce's objective assessment of the situation and clever intervention overcomes mindless brutality every time. His rational, detached Aquarius Moon is helpful here also. It's easy to come up with a good plan if your emotions don't get in the way. When he's not acting, Bruce stays busy with his three children by his estranged wife, actress Demi Moore. With his 7th house Sun, Bruce defines himself more through his primary relationships than he does through his work.