Only once have I been on ice so clear that it felt like I was walking on top of the water. It was only a couple inches thick, but it was amazing. No bubbles or imperfections at all. The water was very clear, 7-8 foot of visibility. Fishing sucked because of the clarity, but I walked all over the lake near the house just looking at the bottom. I found things that I never knew were on the lake bottom.
It was really eerie walking on that ice.