Complex sentence: Underhill fired an AIM-7 at Sayhood's wingman promptly hitting him head on killing him, at the same time this was happening, Rodriguez was locked up by Sayhood, throwing him onto the defensive.
Split into simpler sentences: Underhill fired an AIM-7 at Sayhood's wingman promptly hitting him head on killing him. At the same time this was happening, Rodriguez was locked up by Sayhood, throwing him onto the defensive.