I don't have personal experience, however everything I have seen and read, the person breaks the rock with a hammer and chisel. You don't want to damage the foot trying to pry it off the rock. Additonally, it can be a little cumbersome trying to get the mushroom to reattach to a piece of rubble. Most people stick the loose mushroom into a cup full of rubble and then cover the cup with some type of netting to prevent the mushroom from being swept away until it attaches itself to a piece of rock. Good luck!