Jacks leg out of the bed....
Just something I noticed and thought I'd point out.
In 'Somethings Gotta Give', when Jack is in bed, he always has to sleep with one legs on top of the blanket...and I noticed in 'About Schmidt' when he gets into the waterbed, he sticks his leg out and ontop of the blanket.
Made me laugh coz in SGG I thought it was his 'character jest', yet it must be something that jack Nicholson actually does as a habit in reality.