when working on railway a few years back,I was working on a very quiet branch line usually only used for freight trains,there was very little cover so got squat at best place I could.Half way through the motions(I had the squitts), a passenger train came slowly around the junction from the main line onto the branch line(had been diverted due to blockage lol).no time to pull my trollies up,i just squatted there and waved at the bemused train full of passengers,6 coaches full of passengers btw.