These latter sources have relatively large uncertainties due to small
total ice column densities.
I don't see the GL moving until after any previously built up driving force (height of
unsupported ice column) has already been released (deformed to a lower height).
At − 40 °C (− 40 °F) and a supersaturation with respect to liquid water of close to 0 percent,
hollow ice columns form.
After damaging him a bit more,
the ice columns that he pushes will start to get bigger so plan your jumps carefully so you don't get pushed off the edge.