The ice melts very fast, but sadly under said ice there's a regular rock! :D It's a little smaller than the ice ball initially was, but still large enough to make pancakes out of them.

However, there is a turn to right they can use to get out of its way, since the rocky ball will continue forward the same path it was set on. It's that or running until you come across an empty pit - or somehow breaking the rock with autumn powers or explosions!