Complex sentence: During the battle, while Two-Face tosses his coin to decide Batman's fate, Batman throws a handful of coins towards him, which causes him to lose his balance and fall to his death while searching for his coin.
Split into simpler sentences: During the battle, Two-Face tosses his coin to decide Batman's fate. To stop Two-Face, Batman throws a handful of coins towards him, which causes him to lose his balance and fall to his death while searching for his coin.