Continuity mistake: Rollo and Bjorn are seen practicing with one another. Rollo slashes Bjorn across the left side of his stomach first and then slashes his right arm. After Rollo forces Bjorn into submission on his back he then extends his hand and helps Bjorn to his feet. When Bjorn stands up the slash mark across his stomach has completely vanished. (00:07:25 - 00:08:20)
Vikings (2013)
1 continuity mistake in Boneless - chronological order
Continuity mistake: After spotting Lagertha's boats, Torvi points at the boats and lowers her pointing arm. Another shot later and she is still pointing and lowers her arm again.
Bjorn: What are you so afraid of? It's only death.