Continuity mistake: During the fight, the extent to which the fire (starts on top of the mound) spreads toward the ground varies. Also, the fire burns downward through snow, but does not melt the surrounding snow along the sides and bottom of the mound. (01:15:35)
Deliberate mistake: A flare thrown on top of a snow-covered mound of logs/twigs is not able to engulf the area as fast as it does. (01:13:13)