Jet_A_Knight aint dat de troof.
There are maybe thousands of young heroes out there who have never known how close to death by heavy blunt instrument they have come, when they tell the engineeer, whilst shrugging shoulders, "it's broken" and then are unable to accurately describe the sequence of events preceding the "breaking".
I've never met an engineer who wont help you out if you show you are genuinely interested in what he does.
To this day youngsters ask "how did you know that", simple really I just took the time to ask.