My favourite is a bone marrow Biopsy. I was offered a sedative but as it would have meant hanging around after the procedure waiting for it to wear off, I declined.
The specialist had said she'd do it herself as she "liked to keep her hand in" ( she looked about twelve years old and I wondered if the Hospital was having a "bring your child to work day" and the Specialist was letting her daughter have a go)

Interesting procedure, I'm curious so I decided to watch, you lie on your side and they push this big needle like gubbins into the flesh of your hip until it reaches the bone, then they drill through the bone and a hollow tube takes a piece of the bone marrow out)
What did make me smile was the Specialist carried her kit around in a small black and yellow plastic toolbox, like the sort they sell in Wilko 😁