I have learned that you really will never see it all!
Though, finding a metal 'caution' triangle in a hay bale, presumably from the tractor that was baling, was certainly baffling...until I put two and two together!
And then hubby opened up this bale to feed and found a dead.baby.skunk inside. Nice. Now I have seen 'a lot' when it comes to surprises in hay bales. This would be like finding a needle in a hay stack!