Complex sentence: Sailor John, now losing it, grabs a dynamite, which frightens Thomas, who begins to brake but before Sailor John can throw it at Thomas, Skiff rocks from side to side in order causing the dynamite to hit a rock and explode.
Split into simpler sentences: Sailor John, now losing it, grabs a dynamite, which frightens Thomas, who begins to brake. But before Sailor John can throw it at Thomas, Skiff rocks from side to side in order causing the dynamite to hit a rock and explode.