Complex sentence: Franco volunteers to sacrifice himself to save the others, and although the plan succeeds and a blue beam begins to take him to Heaven, Franco taunts McBride as he ascends, causing the beam to vanish, allowing the cannibals to kill and eat Franco.
Split into simpler sentences: Franco volunteers to sacrifice himself to save the others, but although the plan succeeds and a blue beam begins to take him to Heaven, but Franco taunts McBride as he ascends. This causes the beam to vanish, allowing the cannibals to kill and eat Franco.