When I was about 12yrs old I was fishing with my parrents and their friends in lake erie by middle bass island. We were fishing for perch. There is a dropoff by the island which we would drift over and everyone would hook up. On one of the drift runs I bounced my bait off of the bottom and hooked a flat rock about 5" round and very flat with several holes in it. I thought I had a fish because it seemed to fight as I brought it up. To my suprise and everyone else it was a rock. I've cought many a fish and various tree parts but only one rock in my lifetime.