In Anger Managment (2003) Sandler plays Dave Buznik.

Dave Buznik a hardworking businessman with a pacifistic nature that has often gotten the best of him, often causing him to avoid conflict whenever possible. But a simple misunderstanding aboard an airplane quickly escalates into a legal nightmare for Dave. As a consequence of the incident, the only way for Biznik to dodge jail time is to seek the help of a very unlikely anger management instructor by the name of Dr. Buddy Rydell (played by legend jack Nicholson). The good doctor's unorthodox methods and his own way of acting border is borderline psychotic, but may be Dave's only solution to a problem that has put him in a position as a stepping stone his entire life.