Since the snowboarding incident that left him with a fatal injury, that did heal, Grusha refused to snowboard again. You felt bad because you were the one who helped him master a few tricks on the board. But since the, rather small, battle field was made of ice, you figured that maybe you could help Grusha get back on the board, starting with sliding across a flat surface.

Grusha agreed after you pestered him for ten minutes. He was holding his snowboard under his arm, while you were just gonna show him by sliding across the icy battle field.