In the past month the lock on our front door jammed a few times to the point where we could not open it and had to get creative on how to break-in to our own house. The last time it happened the caretaker's 5 year old son crawled through a semi open window to unlock the door from the inside.
Our landlord approved a new lock on the door which I assumed would mean changing out the cylinder like we would in the US. Nope....
I walked in the front door after a market run to find a worker using a grinder to remove the entire lock casing which had been welded on.
The entire job took about 30 minutes (this included painting the new lock casing and sweeping my floor). Pretty impressive.
Side note on locks here, they are almost always "double throw" locks which means that to fully lock or unlock them you turn the key two and half times. This not only extends the dead bolt farther, hence making it stronger, but also makes the lock a lot harder to pick.