Just watched Non-Stop on HBO, and I noticed something strange about Liam Neeson's face

I guess (?) this could be considered a spoiler so don't read on if you don't want to be spoiled for Non-Stop (but honestly, who cares, the movie isn't good anyway).

In the final shot of the movie, Liam Neeson smiles at Julianne Moore and the whole time I kept thinking, what's up with his face? I couldn't explain it, it just looked weird. Not the usual Liam Neeson face. So I go online looking for discussions about it, and I found this on the imdb message boards for the movie:

Neeson had a stroke in the final scene

Is this true?? Seems like crap to me, but, his face did look very weird. And imdb even has it listed as the #1 fact on their trivia page for this movie.

Anyone seen the movie, and/or know what I'm talking about?