he knows that i'm a gadget guy, ground penetrating radar. i'mi . gpr. i'm pumped. >> this lawn mow ser is shooting radar beams into the ground and viewinge th anomalies in theat's soil. >> i made just have to dighow itthe, if there is a hole that has been dug it will show on the screen, it will not show you the shape, but show you how the soil has been filled back in over whatever hole was dug. this is roots. see this roo was st here from tt tree over there. that is probably what i was seeing. this one a bust. if it was easy everyoneg if it was easy everyoneg would dohow the key to this thing