Complex sentence: Upon takeoff, Sam overhears that one of the passengers had a vision that the plane would explode, but its too late to leave the plane, and both he and Molly are killed in the resulting explosion.
Split into simpler sentences: Upon takeoff, Sam overhears that one of the passengers had a vision that the plane would explode. But its too late to leave the plane, and both he and Molly are killed in the resulting explosion.