At first glance, Jessie Nelson's I Am Sam may seem like a sort of Rain Man part 2, investigating what would happen if a developmentally disabled person were to father a child.
To grasp the shameless, trolling-for-Oscars concept behind "I Am Sam," an insufferably mawkish, mentally-challenged melodrama of self-aggrandizing proportions, just imagine a tear-jerking "Rain Man" sequel with Dustin Hoffman in a custody battle over a button-cute 7-year-old daughter.
I Am Sam learned everything it knows about retardation from Rain Man and Charly.
Reminiscent of so many other films where normal people learn from the mentally-challenged, (Charly, The Second Sister, Rain Man, etc.) Pfeiffer becomes a calmer, more competent attorney and parent as a result of her relationship with the good-hearted Sam (Penn), who bugs her, of course, but ultimately charms her.
There are some who will simply dismiss Penn's phenomenal performance in the title role as just another "Rain Man" but they'll be forgetting that Dustin Hoffman's contributions to that film were actually rather good (as was the film itself).
His performance ranks with that of Dustin Hoffman in "Rain Man" and Leonardo DiCaprio in "What's Eating Gilbert Grape."