I had my left hip completely replaced 2 years ago. It has been such a success I forget that it was even done it works so well.Yesterday i was hunting at a old school. I took a break and I sat down on the ground. I sat the x30 down beside me and it went crazy. I thought dang there must be something in the ground right here with out getting up I just picked up the 30 and scanned the area right next to me and it went off crazy..I got up and started searching and it went away.. What the? I thought It must have picked up something in my pocket or the rivets on my jeans and then I realized its my hip..I laughed at myself..