Something silly - testing of helium inflation equipment
We were lent some helium inflation equipment to test. And, what do you do when you're asked to use a full tank of helium? You inflate a few hundred balloons and make a silly video.
Of course, we did nothing to coral the balloons since they weren't meant for a project. That meant they were up on the ceiling when we went home for the night, and we walked into a sea of floating balloons the next morning.