I personally don't pay much attention to the endless variety of different printing anomalies that can be found on most cards, but if you enjoy those kinda things, here's something new I noticed on one of my graded
1973 Topps #174 Rich Gossage Rookies. I searched around a while and located another example relatively quickly on eBay (below), so it is recurring and assumedly pretty rare as far as these things go.
A spectral blue orb hovers right below the Goose's pitching hand...
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