Thank you for letting us use your room for our program. I understand that allowing a group of children and a person you don't know into your meticulously-designed classroom. Any number of things could happen. Items could go missing from children's desks. Projects could be messed up. Books can be moved. A mess could be left all over the place. All of these things have happened in the past because children don't know how to keep their hands to themselves when they see something exciting, and very often the instructor doesn't catch it. Sometimes the instructor doesn't understand how to properly clean up a room.
I received a call about your room being disrupted, that some xylophones were all rattled and knocked over. We discussed that if this happened the day before, it was not my class. I made it clear to my students that they are not allowed to touch any of the musical instruments when not supervised by the music teacher. I have the fear of God put into me about this, and I also know what it would be like to go into my workplace and have all my stuff moved or disrupted. If they knocked things over while getting their backpacks, I didn't see it, and I am very sorry. I will have them put their backpacks somewhere else.
But you sat in on my class to use your computer. I understand you might have work to do, but that freaks me out. I was expecting a phone call to the office for one reason or another, because our classes don't run the way yours do. At the start of class, the kids came in to put their backpacks down. One of the kids went to get something from his backpack, which he'd put behind the piano. As he bent over, his butt touched some of the keys and made a noise.
You RACED across the room in three steps to give him a verbal whipping, the likes of which I don't think I have EVER seen. It was an accident. Everyone who saw it knew it was an accident. He told you it was an accident. Holy. Fucking. Crap.
The more I work in elementary schools, the more I think that every person there needs a lot more vacation time. Or an in-school massage parlor... or an open bar.