The ice looks safe… until you step on it.
Diffrent stages of cracks.
When you sneak nothing happens but if you sprint the Cracked Ice breaks
The Cracked Ice regenerates after some time
Boats also break the Cracked Ice but if you are fast enough you can outrun it!
Minecrats aren't as fast as the ice breaking so usually they drown :(
Depending on mob heaviness, the Cracked Ice will either break instantly or not break at all.