Complex sentence: After his maniacal laughter echoes away, the lights go out--lightning and thunder effects fill the space as the ceiling turns invisible, showing an ominous figure hanging the groom from the rafters with a noose in the attic.
Split into simpler sentences: After his maniacal laughter echoes away, the lights go out. Lightning and thunder effects fill the space as the ceiling turns invisible, showing an ominous figure hanging the groom from the rafters with a noose in the attic.