I had several.
There was this factory where they lay a thin coating on wood (or board) used for making kitchens for example. On saturday mornings the factury was closed for maintenance, so me and a bunch of other guys climbed in and around these huge machines to clean them. There was mechanical maintenance as well, so whenever you heard a sirene you had 10 seconds to get out if you didn't want to get hurt.
Worked in a printing office (or is it pressroom in English?) as well. Boring. Had to stack the printed papers on pallets.
Worked for a while with a photographer who mainly took pictures for commercial use, like for example an add in a paper for furniture. We had to set up an entire room with fake walls and windows, lay the floor, put the furniture in it. He would take a picture of it. And after that we broke it down again to set up a new decor. Sometimes we really could kill that guy: "No I don't like that wooden floor, do it again...". The only fucking thing he ever did was just take the picture and sitting on his ugly ass.
Had one reward though. Once he had to take pictures for sunbeds and there was this chick who got naked to be part of the decor. We weren't allowed to be in the room at the same time, but we had our places for a good view non the less.