I was doing a little dirt digging the other day and my pro-pointer would go off every where I laid it down. I stuck it down in the hole I was digging and turned it off and then turned it back on to de-tune it and it didn't pick up any signal after that. I could take it out of the hole I was digging and turn it off and turn it back on and it went nuts again. Anybody got any ideas. I was under a power line, but it didn't do this but in a few spots. Found small piece of wire and some small metal fragments, but this was a first for me.