One of our colleagues happened upon a situation where his interpreting effort during a film shoot lasted 27 hours in a row. The original plan was to keep with a "normal" shooting day, meaning preparations starting at 5:00 a.m. and working on up until 10:00 p.m. The last scenes were supposed to capture a train coming into a station at dusk. The shot didn't work out so the earliest possible opportunity for a re-shoot was used, where dusk was replaced by the dawn of the following day. In order not to waste any precious time, several night time scenes were shot in the meantime. So the exhausting interpreting stint ended around 8 o'clock the following morning.