i did some bartendering work but it was for a very quiet and relaxed pub, it got fairly busy on a friday or saturday night, especially if i was on my own for some reason, but most of the customers were locals and pretty cool except for the occasional asshole.
i worked in a gun club, boring as hell, but it became a hard job at winter, stuck in a snowhole firing off clay pigeons. i had one machine which auto fired when they pressed the pull button, if your fingers or arm was in the way of the mechanical arm then you would get a nasty bruise and smashed clay in your eyes

- the hardest part was being in the snow for hours sat still, but having to stay alert. i did that job for £10 and a sandwich. i was there for around 4-5 hours or so. so that was pretty shitty.
the most stressful was when i worked as a recruitment consultant though, high targets, crazy aggressive bosses, and lots of cold calling to people who dont want to listen to you, and lying to receptionists.. etc.. "im from cisco - your router just went down put me through to your chief of IT!!!"