I think I've smelled that too - but wasn't sure whether it was a nasty figment of my imagination... My girlfriend has a better nose than I have, and didn't notice it at the time.

Without pointing fingers, I've been surprised since that the train company had so little to no outreach to passengers on possible trauma. Nor did I get the impression that there was a ready-made script for the passengers transported away from the scene - hundreds of people were dumped on a deserted train station, all connecting trains had left, not announcements or supervision were made, it took another hour (3 hours after the incident) before an alternative shuttle was arranged. For a company that deals with hundreds of suicides per year, it all took me as surprising, in retrospect.