I once asked a construction worker (with the help of my former boss who worked in a supermarket and vouched for me) to help me cut open a friend’s bike (she went on a school trip, the day before the key broke in the lock, so she asked me to take care of it so no one can steal it). He used a gas powered angle grinder to cut it open. No one even seemed to look in our direction in the middle of the day in the city center.