Boris follows in the same direction as the other bounty hunters, yet behind him are only his footprints in the snow.
Jo Junga says he will play his "flute" to lull Jack into a false sense of security, however in the hypothetical attack sequence and later in the episode where he is actually playing the instrument, it is no a flute but rather a didgeridoo.
How could the barber be surprised when the man he is cutting the hair of puts on his helmet? Boris had to come in there and either with his helmet on his head and in his hands, the barber would have already known.