Complex sentence: Another memorable Pie Slide moment featured Marc having the audience point to someone who they wanted to see go down the Pie Slide, and everyone in the audience pointed to Marc, which meant that Marc had to go down the Pie Slide, head first.
Split into simpler sentences: Another memorable Pie Slide moment featured Marc having the audience point to someone who they wanted to see go down the Pie Slide. Everyone in the audience pointed to Marc, which meant that Marc had to go down the Pie Slide, head first.