My mum went to the Dutch equivalent of a grammar school, and had to learn classical Greek as well.
According to her, Greek irregular verbs nearly induced a nervous breakdown.
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Mon 8 Jun 2009, 23:09, archived)

My twin brother did o level ancient greek in two terms because he had some time spare after doing 5 of them a year early, the swotty cunt
I'm not sure he understood a word of it, just he's very good at remembering stuff.
(bogus official shove it up your cunt, Mon 8 Jun 2009, 23:11, archived)