Who else became very angry at Jack Nicholson?

yeah i didnt like his character until the end! even then i wasnt sure of him tbh :s

This movie has a weird 'Zen student' vibe.

Jack Nicholson acts as annoyingly as a typical Zen teacher in those old Koans; heck, a Zen teacher cuts off a student's finger in one koan!

Sometimes you need someone to kick you around a bit or shake you up to awaken something important inside of you. Do you want to be a superficial douche all your life, or do you want to wake up to knowing your true self and learn harmony with the Universe?

You have to pay the price for the achievement - the lessons can be quite painful, but in the end, it's all going to be worth it. This is why in Zen koans, the teachers are often very harsh and shockingly merciless, because the 'prize' is worth all the tears and sweat.

Nicholson's character resembles a carefree Zen master, while Sandler's character resembles a typical, stressed-out, materialistic and pathetic wealth-chaser that's spiritually stuck and going nowhere without someone's help.

It doesn't matter if he has an 'anger problem' - all that matters, is that he will be liberated in the end from his self-created emotional prison. It's worth a little pain and frustration.

In this way, the movie seems like a Zen koan, and Nicholson is perfect as the role of the insensitive and downright insultingly cruel Zen teacher that knows the student will thank him in the end.