I was watching DPW working in the alley this morning, clearing out the old concrete (they're all about Alleypalooza and what not).
First they used a massive jackhammer to drill holes into the concrete, then they brought in the excavator to dig up said concrete, carting it away in a large dump truck.
All the things I loved when I was a kid. You know, big trucks making a lot of loud rumbling noise, shaking the house and breaking things apart? Yes!