Once again, I don't own swords nor do sword fighting, strictly theoretical. When I made the decision that it was unlikely the sword would fly out of Sigurd's hand I was referencing a video I watched by a HEMA teacher that I trust (He follows a lot of principles I've learned in studying History at degree level.) 

If you want to see it, it's 11.20 to 12 mins on this video. 

[url]https://www.youtube.com/watch?v=1Y5fmah5pIg[/url]