Au contraire m’amie, I fear that the fact that no-care-in-the-world Viggo accompanied him on the way down only enhanced his worries for now he had not only himself put in jeopardy but also the movie’s main lead.
And with Viggo chatting away like crazy seemingly not watching his steps Sean must have been in right torment. I think that was one of the reasons for him being so tongue tied and only when they sat down in the cabin to be lifted back down he could sigh his relief and loosen up.