Stuntmen had practiced for weeks for the oar walking scenes.
Kirk Douglas told director
Richard Fleischer that he could do it and did several times. At one point when he did fall in the icy water he calmly swam over to the camera boat and asked if they had gotten good shots. He then swam back to the Viking longboat. Fleischer noted they were watching and filming an activity that had not been done in a thousand years.
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