Just recalled my school work experience.
Career advisor: "What's your dream placement? Think big!"
Me: "I'd like to work in TV, film or..."
Career advisor: "What's your dad's job?"
Me: "Sales rep in a menswear firm"
Career advisor: "Ok, so I'm placing you in a dept store in menswear. Have fun!"

@Richard_Littler Mine was:

'I want to work with computers'
'We have openings in the library. That's more your level'.

Somehow careers advisers, based on knowing you for 5 minutes, knew exactly what you were and weren't capable of more than you did.