I used to work for a Yorkshire based IT company who had customers all over the country.
One week I was sent down to Sussex on a four-day course to cover an imminent new release of one of the systems we dealt with. On leaving the course on the final day to catch a train home, I was stopped at reception and told that there was a call from my office - this was before I had a mobile phone. Apparently one of our customers in the City of London had a problem with a server, and could I pop in to help out a hardware engineer who was having problems as he didn't understand our OS. Of course this meant that I would have problems getting home that evening, but I could stop at a salesman's house overnight.
So I made my way to the station, and caught a train to London Bridge, and then made my way to the customer's office for an evening appointment. The hardware engineer seemed to be pretty clueless, as all he had to diagnose faults were tools on a floppy that he didn't understand. He was convinced that the fault was with the motherboard, and he would arrange for one to arrive at the office for him to fit the following morning. Could I be on the phone the following morning to guide him?
So I headed off to call our salesman to arrange to stay the night in his spare room. I somehow managed to catch the last District Line train to his house to stay for a few hours, then on to catch the first train back to the office.
Tired and exhausted, I make it into the office the following morning, and start talking to this engineer. It takes him hours to get the system working again. Then once fixed, it's obvious that he has somehow managed to wipe the server's RAID array in the process, so could I guide him through the process of re-installing the OS and restoring a backup? By this time it is about 5pm in the evening, and I've only had one sandwich to eat all day, and most of the staff from our office have already left for the pub.
So I stay on the phone laboriously guiding him through the various steps to reinstall the operating system, which weren't that easy. The process was made a bit worse as we needed to install various patches to the server before we could attempt to recover from backup, and each one of these took some time. I remained in the office until about 10:20 that evening, caught the bus home, and then stayed on the phone to him until about 1am the following morning.
As I'd been away from home for a week on the course, I had no food in, and by 1am there were not even any takeaways still open, even on a Friday. So I went to bed starving, and missed a local event I had planned on attending.