Complex sentence: Fans from both sides were denied entrance when the duplicate tickets were discovered, which led to a near riot, especially after a Clemson fan wrung the neck of a live chicken at midfield during halftime.
Split into simpler sentences: Fans from both sides were denied entrance when the duplicate tickets were discovered, which led to a near riot. To add to the wild scene, a Clemson fan strangled a live chicken at midfield during halftime.