yes I had that happen on The Nock when I was 20. The ice was close to a foot thick, you could clearly see that, and I saw that there were allot of dead fish and also an Eagle sitting on the ice. As I began to approach on the ice I heard the lengthwise cracking up and down the ale and I was freaked out...thought I was going to die right then and there. I know you get used to it.So the first time I went on the ice was standing next to the hole . Heard the ice cracking and shifting my buddy laughed at me cause I was about 10feet away from the hole. Don’t know where I was going but wasn’t standing next to that hole anymore. Crazy how that ice moves.