that a whistle pitched at the precise resonant frequency of a metal lock will vibrate the levers in such a way that the door will simply swing open.
Use your voice to get the right frequency and crack the safe door like a glass.
When you say 'Q' shape do you mean a tubular pin tumbler lock?
If so try this, it may or may not work but is probably worth a try before you call a locksmith or destroy the safe.
Problem is the safe is screwed into the wall.
How did it take eight responses to get to this o.O
kd