Decided to destress for an hour or two at my local park again after work metal detecting. Worked an area I hadn't touched before. I was expecting much but I wanted to eliminate the area from the zones I've scanned. Found about $0.26, a crunched up soda can and this weird metal round disc fragment. No, it's not Xena's flying chopper disc. No idea what it could be though; the flat style and smooth surface makes me think it was some kind of irrigation part top lid or similar...