When this scene was filmed it was cloudy with a slight wind and temperatures somewhere in the 50's. The water was FREEZING cold! As my "dead" body was pulled to shore and the cameras started rolling again my first thought was about how underwear often becomes "transparent" when it's wet.
And, yeah, the thought ALSO crossed my mind about how cold water sometimes SHRINKS certain things (if you know what I mean) and that people may not see me at my best.
Between camera takes several members of the crew poured warm water all over me to calm down the shivering ... then, to appear dead, I held my breath as long as I could before starting to shake again. Playing a wet DEAD guy in a movie isn't easy when you're shivering uncontrollably.
There ought to be an Academy Award for that.