(The idioms I made bold for easier understanding)
"This is a rip-off," said Max. He stared the cashier dead in the eyes. "Get your act together, Max!," exclaimed his father. "Sir I am all ears, I understand you are upset but you must remain calm in front of other clients," whispered the Cashier. His father watched as Max threw the box to the floor. "This cereal just about costs me my arms and legs," he shouted. The cashier watched as the father pushed the college student out of the store. He heard a scream after that, unsure what ever happened.