Given the task definition and input, reply with output. In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.

Sentence1: My friend and I had a little contest the other day. Sentence2: We tried to see who could blow the biggest bubblegum bubble. Sentence3: We took different turns and would take measurements. Sentence4: When his was getting at it's biggest I popped it.
He was a little mad, but I just laughed.