Complex sentence: The time of the Gember was short-lived, as it was destroyed by the Gurren-Lagann's Giga Drill Break; its pilot however ejected himself before his Gunman got obliterated.
Split into simpler sentences: The time of the Gember was short-lived, as it was destroyed by the Gurren-Lagann's Giga Drill Break. However, its pilot ejected himself before his Gunman got obliterated.