I think you mean dome-ing? Like a big air pocket trapped underneath? The temptation to do something fun with that would be irresistible! Shooting it as has been done would be one of the many fun options.
A long time ago I was attempting to ice-fish on a large pond just on the shoreline of Lake Ontario (Durand Eastman Park), and that ice was reverse dome-ing. The ice, when expanding, pushed downwards instead of up. My friend and I punched a hole in it to fish, and immediately regretted it! Nice thick ice, and water gushed up out of the hole in large quantities, soaking us up to our knees.
It is the coldest I have ever been waiting for his mom to come pick us up. The wind coming off of the big lake, brrrr!!!
On another note, when ice gets thick and really cold, it starts to shrink and crack close to the surface. When you are standing on it and the cracks appear, it is rather nerve-wracking. It makes for a very cool sound, but you may need to wear diapers as it goes very unexpectedly and loud! Usually starts at night when the sun goes down or you just plowed snow off the ice and exposed it to cold air.
