Complex sentence: Before the last two can get to the scene, Sharon finds Gil and knocks him over when falling on him she accidentally stabs herself by falling on his penknife which he was rearranging due to his OCD.
Split into simpler sentences: Before the last two can get to the scene, Sharon finds Gil and knocks him over. When falling on him she accidentally stabs herself by falling on his penknife which he was rearranging due to his OCD.