The movie theater owners will be sued along with the:
farmer who grew the corn, the Agway that sold the seeds and fertilizer to grow the corn, and the water company that provided the irrigation. The scientist who developed the hybrid seed the corn and the other farmer who grew the soybeans that the oil was made out of to pop the corn, and the manufacturer of the popcorn machine, the paper cup maker, and the company that provided the electricity.

The ones that will not be sued are the stupid parents who did not watch the kid and the producer of the inane movie the kid was watching