It's a bad idea to try and use a crane to lift a water tank before checking if it’s empty or not. You can see the crane’s arm begin to buckle under the weight of the tank, before collapsing and dropping the tank onto the side of the building, then flipping itself off the ground.
It’s never a good thing when a crane ends up lying on the ground with its base and wheels pointing towards the sky. Let’s hope no one got seriously hurt.
Here's another angle: