Related to PEBKAC: In Estonian we have a saying: "the problem is in the cardan between the seat and the steering wheel"

Supposedly a fairly eccentric teacher I had (businessman and ex 90s "connected" guy got bored and wanted to teach middle school shop class to confirm the rumors that kids are indeed getting stupider compared to the "good old days") once managed to get an employee of his to go to the parts store to ask for said "cardan" for their car after asking him for advice.