What I loved about this movie was the ACTING. It works because Adam Sandler is brllliantly "real" at all times, even though he plays a silly character in silly situations. His commitment to the role is breathtaking. Somehow you really believe this character would punch out his caddy, go beserk on national television, have a heated argument with a golfball, and threaten a plastic clown face with death! Yet at the same time, the character has an innocence and guilelessness that allows us to forgive him his excentricities. He's just an Everyman who is out of his element, trying to find his way. If he causes tumult and chaos in the area around him, it is forgivable because he is only doing what he has been trained to do, for all of his previous life. "Happy" remains a likeable character even while he is punching out Bob Barker! That is the genius of this movie.
People might tell you the plot of this movie, and all the funny skits that are in this movie, but you still might not get it. I don't think I would have "gotten it" just by hearing a recounting of the plot. The script is funny, and it's a good vehicle, but the reason I have watched this movie over and over again is because Adam Sandler is SUCH a good actor. He makes you BELIEVE. Comedians never get enough credit for this, but in a movie like this one, which is really a pretty bizarre situation, it is his ability to take us into a mode of suspended reality that makes the movie work: he makes the incredible plausible. Bravo!