My breaking point would be the first time I needed to use the ladies room- usually within the first hour or so. They were always stinky with taped up mirrors. (Can't have those vain sisters touching up their make-up or hair.)
If by some miracle I could avoid the ladies room the breaking point would be the old "Keynote Address". The subject was always a lead-in to some later released study book. The " Type and Antitype" and the endless convoluted explanation of some prophesy book like Ezekiel, Daniel, or Revelation. Kids were crying, men nodded off, sisters daydreamed, and I took out my binoculars to see if I could spot someone I knew across the stadium.