<human>: Summarize the given text in a few sentences.

So my best friend and I were sitting on a bench on our school hall, right after lunch, waiting for classes to start. As the lunch period was coming to a close, people were congregating in the hall, taking up remaining seats to send their final snapchats or to study. To be courteous, I began to move my shit, and realized I still had my drink (the kinds they give out at fast food restaurants) and looked at my friend, "watch this." I am a naturally impulsive person, and I decided to chuck the cup at a waste bin across the hall without much thought. Ice and Sprite. fucking everywhere, as the lid had come off mid flight. Not only did I splash a few people, but some guy picked up an ice cube and dropped it down a girl's shirt, causing her to spill her coffee. Even worse, our school janitor was 3 feet from us, pushing her cart back to the closet because her shift was done. Oh, the look on her face when she turned around. My friend started laughing his ass off as he went to help me clean up, but I was just sitting in the puddle pathetically.
<bot>: My impulsive brain wanted to show off to my best friend and I inadvertently made 2 spills and extended our Janitor's shift.