How to dig a hole and get a pipe under your driveway or sidewalk, without breaking it

While figuring out a new way to dig an irrigation pipe trench, some friends told me about this technique for drilling a hole thru the dirt under your driveway - so you don't have to cut thru the concrete and re-patch it. What you do is attach a pressure nozzle to the end of a piece of PVC pipe. Same kind of nozzle I used for the trench project. Attach garden hose to the other end, turn the water on and it acts like a big drill bit.

Makes a huge mess, but can drill a hole thru the mud so you can fish a pipe in thru there, or wires or whatever.