Fun Things to do on the last day of school?

So my last day of middle school is TOMORROW. Crazy right? Well, i've been thinking for a while, I NEED to do something the last day. It'll be the last time I'm at the school, since i'm going to high school so. Anyways first let me say that kids at my school have big mouths. Because there was a planned food fight, but someone snitched or had a big mouth so this whole week they have had us eat in our classrooms for lunch. And 2. There was gonna be a water fight but someone snitched and or had a big mouth AGAIN so today and im sure tomorrow, they are dismissing us by grade and forcing us to go directly on the bus. I need some fun pranks (possibly to get enemies back) and or just ways to enjoy myself the last day.