Attempted murder on the Waterloo express? : 1971 : Bagshot railway station

Kapow! There was an explosion. Before I even grasped what had just happened, I could see I was covered with shards of glass. What was that noise? The train window I was sat next to had suddenly vanished and was in pieces on me and the seat. Luckily, I had not been looking towards the window at the time, otherwise my face would have been injured. Luckily, because it was winter, I was wearing an army surplus hat with furry earflaps that had protected my head and ears. Luckily, I was wearing a coat over my school blazer, gloves and long trousers that had shielded me, these winter woollies necessary because trains' heating systems rarely functioned adequately.