Ever since I started detecting, I would mostly use disc. mode to search schoolyards and parks. I knew that there were iron signals in these places, but I always figured they weren't worth digging. Then, a few months ago, I decided to start digging them, just to see what they were. While some were indeed junk, many were actually nickels and other desirable targets (including some rings and jewelry- junk, mostly, but definitely fun to find). Keep in mind, these were solid iron signals in every direction. I'm just wondering if anyone else has had a similar experience. I also wanted to get the message out there; that is, don't be afraid to switch into all metal and dig those "junk" signals on occasion.