A good GPA at the National University of Singapore (NUS) is typically considered to be around 3.5 or higher.

The ending reveals that Jill held onto a sixth envelope that contained a picture of Hoffman himself. Jill locks Hoffman into a (manipulated) new version of the Reverse Bear Trap and leaves him to die; he survives, but gets his right cheek shred in the process.

Hoffman is clearly a sociopath, as shown by how he continues to do traps after Jigsaw and Amanda's death when it is no longer necessary for no other reason than out of his own enjoyment. It is shown in Saw VI that he listens to the audio tapes of his victims suffering.