Hopefully this is not a sign of climate change in Tooki’s universe! But these fragile patches of ice are found all over the Polar World. Just strong enough to hold Tooki’s weight for a short period of time, once these patches are touched, they will start to crack and you have only a few seconds to send across anything that needs to be on the other side.
Planning your route is paramount here, it's exceptionally easy to cut off your way back and be left stranded in the cold to freeze. Standing on a patch of Thin Ice for too long or trying to run across at the very last second is a very bad idea, dropping Tooki into the sub-zero waters below. These holes may be advantageous for getting rid of unwanted elements, but mind your Carrotonium does not slip in.