Pot washer at the Harvester when I was 16. Filthy job, but because I stuck it for a few months I got promoted to bar/starter chef. No experience, no training. No pride in my job either, many a plateful got returned due to poor appearance!
One Saturday evening, the restaurant was full, but we'd had no receipts with the orders printed on them for about 20 minutes. Manager runs in screaming the place down, opens receipt printer, finds dozens of orders all rolled up. We had to sort out who'd walked out, and who was first. Nightmare night. Next day I was basically asked to quit. I duly obliged.