Story of regret

Last semester, it was my first semester of school at University, it was a very chaotic one; a lot of random things happened to me, and the experience that I am about to relate is one that I particularly  regret. 

Every Wednesday we used to have an special class at the B building. It used to last 3 hours so we had small breaks to eat something or go to the bathroom. To that class we needed our computers, so, during the break, we usually left them in the classroom with our packs.

One of those days, i went to the cafeteria with a friend to eat a “mollepizza”, and we were waiting in the line when another friend appeared at the cafeteria, I thought my grey back-pack was next to him. I was lookin at him from the distance and he was also looking at me at the same time, suddenly he turned his eyes down to look at my back-pack and suddenly, he kicked it.

I thought it was funny, so I walked until I was on the other side, near were "my back-pack" was located and I kicked it too. A second later both of us were kicking the back-pack. Then, my other friend, which was buying the  “mollepizzas”, came to us and asked to me: “Why you didn’t leave your back-pack at the classroom?”, then, I said “I left it, but Emilio [my friend of the kicks] brought it here”. When I saw Emilio’s face I realized that he hadn’t brought it, and I hadn’t brought it too; and then I remembered that in that specific day, I had brought another back-pack.

At that moment, when we were looking at each others face, we realized we were kicking the back-pack of somebody else!, we didn't know how to react, so Emilio ran away, and a few seconds later I did the same. If I had remembered that was not my back-pack, I would have stopped Emilio at the very first moment he begun kicking the backpack.