Complex sentence: When he encounters L.J. (Mike Epps) and thirteen other members of S.T.A.R.S, they open fire on him, but, he guns the S.T.A.R.S down but spares L.J's life when he drops his weapons.
Split into simpler sentences: When he encounters L.J. (Mike Epps) and members of S.T.A.R.S, they open fire. He guns the S.T.A.R.S down but spares L.J's life when he drops his weapons.