The jet engine falls through Donnie's roof, and since Frank allows him to live there is a new universe known as the Tangent Universe that is created as a pocket universe; Frank tells him that in twenty eight days the highly unstable pocket universe will be destroyed and become a black hole, which then destroys the Primary Universe. Frank, many say, is a sinister spirit attempting to lead Donnie away and destroy the universe by making good things happen to him --- an outcast speaks up against a local author, he meets a girl. But then it appears Frank shows him that if he continues to live that everyone else would be killed; Frank would die, the real Frank and not the Manipulated Dead Frank that guides Donnie, and his girlfriend would also perish if he happened to continue to live. So, he decided to return the universe back to normal by ripping the jet engine, which then will fall through the wormhole, thus the origins of the engine; Donnie then uses the wormhole to go back in time, gets into his bed, and dies as nature intended, effectively destroying the pocket universe. Donnie has the ability to tear off the plane engine because he is the Living Receiver, the person most closely associated with the object that disrupted the Universe (i.e. the plane engine).