Gastroliths
Many reptiles, birds, and some mammals swallow rocks and other hard objects to aid digestion. Prior to contrary belief, lizards are actually pretty stupid. It’s easy for a human to differentiate a steel plate from a rock, but everything is a rock to crocodiles. There is a high chance that MJ swallowed that steel plate for this reason, but why would the steel plate even be in a bog in the first place?
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