As i settled into my newspaper on the mid morning train from Edinburgh to Glasgow recently, a couple of young guys bundled themselves into the seats across the table from me. They were very good-humoured but clearly agitated.

My curioisity got the better of me and I asked them what they were up to. I was instantly drawn into their little adventure and the newspaper was discarded.

It just so happened that I was carrying my video camera at the time, and the opportunity to wave it about was just too good to resist. I took it out and let the drama unfold.