Took my ETrac to a local park and found my first silver with it, a 1942 mercury dime. Found some clad as well as a few rusty nails and bolts. Had something happen that confused me though. I was swinging along and got that nice high tone. Couldn't get it to repeat swinging slow but it was there with a fast swing. Thing is, I couldn't pinpoint where it was. Even tried switching to TTF and hot nothing. Was this a ghost signal or was the machine telling me something dig worthy was there? It was ringing in at 50 on the conductive when I got it to hit. Any similar experiences or input?