Oh man, that reminds me of the time I was metal detecting and got a huge signal. My heart was pounding, thought I had some old coins or something. Dug down and pulled up this mangled piece of a lawnmower blade. Just a hunk of rusty metal. Felt so dumb after getting all excited.
That huge signal you mentioned, @barbara_kim93, is so often farm junk like lawnmower blades. But I read once that rusty old tool pieces can be from forgotten homesteads where families lived decades ago. Even though it's not treasure, finding that blade means you uncovered a bit of someone's daily life from the past. It's like holding a piece of local history that got left behind.
Read an article once that called those junk finds "false heartbeats." The thrill is real even when the treasure isn't. Makes the actual good finds feel even better later on.