That is unbelievable. I had no idea that could happen.

Bizarre! I can see it spinning, but how is it that the bullet didn't just ricochet of the ice?

I have pretty solid background in Mechanical Eng and Physics, but I can't wrap my head around this.

Same There are a few of these videos on utube using various calibre I would have thought the bullet would distort and richochet on hitting ice,very strange.

I think you have two (2) physical states of matter in direct contact with each other; a compressible surface layer (air bubbles/layers present) backed by a non-compressible liquid.

I'm reminded of fort defenses that were adapted to counter the development of black powder and cannons- a thick outer wall of stone, backed by semi-packed fill dirt which absorbed and distributed the impact forces. The cannon balls bounced off and the walls, though damaged, remained intact.

I'm not intrigued enough to try this myself.