Badmonkey005 wrote:This is just out of pure curiosity, I randomly thought about it and wonderd.
What does a locksmith do if he/she cannot open the intended lock? What do you say to the customer? That has to be embarasing.

No embarrassment!
For a $4 bicycle lock... Don't even bother trying! Immediately come the boltcutters and I'd simply cut it off. As a courtesy (and part of the fee) simply hand the customer a new lock from the pegboard. ...after all... time is money and even if you could open it quickly, it'd still need a key cut for it. And when they see how easily the cutters went through their old lock, they'll appreciate the new one.
(ianal)
z