Wasn't the first time and wouldn't be the last either in the history of railroading.
What do you call that up there, short flagging? We had to, by Rule, place detonators on the track 200metres out from a rear portion when returning.
When I was sitting my Driver's ticket in the early 80's I had been reading a NTSB report from the NZR library about a beauty of a culmination of errors and as we were often double banking on the Matahiwi out of Woodville I made sure that all the Drivers in the depot read it so none of us came to grief going back for the rear portion.
That report is here [
www.ntsb.gov] years later in the US on a trip I was talking to a BN Engineer that just happened to be on the relief train. He was very surprised we knew about it.