Complex sentence: Eventually Buffy, Faith, Willow Rosenberg, Debbie and Rupert Giles arrived in time, as Buffy attempted to sedate Oz with the tranquilliser gun, Debbie thought she was aiming for Pete and shoved Buffy, causing her to shoot Giles and knock him unconscious.
Split into simpler sentences: Eventually Buffy, Faith, Willow Rosenberg, Debbie and Rupert Giles arrived in time. As Buffy attempted to sedate Oz with a tranquilliser gun, Debbie, who thought she was aiming for Pete, shoved Buffy, causing her to shoot Giles and knock him unconscious.