Just for the record, I marvel at how many institutional actions (IA) are handed-out nowadays. That said, let's get to your question: Medical schools understand that students learn from their mistakes. Schools are looking for patterns of misconduct and are less interested in a one-time blip (especially something as minor as your event). So, it's important to be fully transparent about the event and keep it matter-of-fact. I don't think you need to add much beyond the description of what happened. Don't editorialize or put blame on the dorm director or school. Here's advice from Marquette pre-health advising: Institutional Action // Center for Pre-health Advising // Marquette University Reasonable people will think this is a nothing-burger. As long as you have a good GPA and MCAT scores, I think you're going to do just fine. Good luck with your applications!