In my early times I was working as a pipeline jockey on an R44. I was paid a low basic salary plus a bonus for every flight hour. Instead of getting the job done in 4 days (average required flight time for that specific pipeline was 25 hours) I decided that it can be done in only 3 days.
Somewhere around 20:00 pm and some fuel stops later we (the observer and I) called it the day after realising that we had left the pipeline track for approx. 5 minutes without realising it and without knowing where we were. Upon landing at the nearest airfield we had a total of roughly 11 hours of flight time. Can't say how many miles we covered that day but that is the most flight time in a row I have ever flown in a single day.
As mentioned earlier: I was young and in need of that money ;-)
