Most discomfort I ever felt was when I had to have an endoscope put down my nose. They didn't tell me I had to inhale the local anaesthetic so I felt the endoscope scraping against the back of my mouth and throat. I've sniffed the spray every time since!
Ireland. I doubt any schools offer it as a curricular, but it is an exam subject. Generally the only people sitting the exam are Chinese native speakers who moved here.
I did one of these a few weeks ago. You had to do 20 in a row and I got about halfway through before realizing the symbols at the back actually meant something. I literally didn't notice the symbol on the left side.
Some mild discomfort but I managed to grin and bear it. There was a nasty aftertaste and numbness for half an hour afterwards too.