Definition: Based on the given context, craft a common-sense question, especially those that are LONG, INTERESTING, and COMPLEX. The goal is to write questions that are easy for humans and hard for AI machines! To create such questions, here are some suggestions: A. What may (or may not) be the plausible reason for an event? B. What may (or may not) happen before (or after, or during) an event? C. What may (or may not) be a plausible fact about someone (or something)? D. What may (or may not) happen if an event happens (or did not happen)? You can also create other types of questions. DO NOT make your question answerable without looking at the context, or question of which the correct answer can be directly extracted from the context. DO NOT ask a question that requires very specialized knowledge that is not common sense. DO NOT ask too simple or too short questions. Your question must be related to the context and answerable with common sense. Try to add more variations and complexity to the questions.
Input: Context: He was probably a bit overstimulated today , but he 's handled the transition very well so far I think . To address the Twitter post from the other night : I was having a ( perfectly innocent ! ) pillow fight with a friend the other night , and she accidentally knocked one of my standing lamps over . The glass shroud hit my head and broke , and also managed to give me a pretty wicked cut on my head . It was n't quite bad enough to need stitches , but the glass shroud was thick enough that I ' m just glad it did n't actually bust my skull open .

What may be the reason for the pillow fight ?