Hot Tube Time Machine

Spoiler: the squirrel disrupts the space time continuum. Hot Tube Time Machine is the kind of R-rated comedy that makes its mark because of the right actor in the right place at the right time. Plus unlike the R-rated film from last year that grossed half a billion worldwide, The Hangover, HTTM involves time travel and is also frequently funny.
We're not talking classic funny like the Marx Brothers, or Groundhog Day or The Big Lebowski. Yet HTTM has the power of guffaw. Rod Corddry leads the laugh count, John Cusack gets by on his good looks, and Craig Robinson establishes himself as a true talent. Other than the lead actors high jinx, HTTM is the kind of film you would be embarrassed to see sitting alongside your mother. Unlike movies made in the era that HTTM emulatse (specifically 1986), Peggy Sue Got Married and Back To The Future, this is a one shot oddity good for grins but little else.