Complex sentence: At the Hatch, Locke eases Kate down the shaft, when suddenly Kate realizes that there is something in there, and in a sudden burst of light from within the hatch, Kate mysteriously disappears.
Split into simpler sentences: At the Hatch, Locke eases Kate down the shaft, when suddenly Kate realizes that there is something in there. In a sudden burst of light from within the hatch, Kate mysteriously disappears.