Complex sentence: When G.I. Joe arrived and disabled the controls on the exo-armor, Roadblock lunged towards Destro and Scrap-Iron as they get into their helicopter, and deflected the missile back at the helicopter injuring part of Scrap-Iron's head.
Split into simpler sentences: When G.I. Joe arrived and disabled the controls on the exo-armor, Roadblock lunged towards Destro and Scrap-Iron as they get into their helicopter. Roadblock managed to deflect the missile back at the helicopter injuring part of Scrap-Iron's head.