Charlie himself also deserves a nod; while likely to have been expelled prior to Frank's intervention, he refuses to confess who set up the prank regardless. As Frank points out, nothing could persuade Charlie to sell someone out for his own future - demonstrating exactly the kind of loyalty and character the school claims it fosters.
Frank's tango with Donna.
Charlie refusing to leave Frank when he is about to kill himself and successfully talks the Colonel out of it.
The entire sequence when he's test-driving the Ferrari. A blind man not only handles a sports car at a definitely unsafe speed, he even manages to talk his way out of a ticket - the cop who stops him never realizes he's blind.