Complex sentence: Bond then reveals his cigarette lighter--the Leiters' gift for being the best man at their wedding--and sets Sanchez on fire, who stumbles into the wrecked tanker, blowing it up and killing himself.
Split into simpler sentences: Bond then reveals his cigarette lighter--the Leiters' gift for being the best man at their wedding--and sets Sanchez on fire. Sanchez stumbles into the wrecked tanker, blowing it up and killing himself.