40 second mark:

Princeton being Mooch’s alma mater.

Via The Blaze:

… But reportedly after offering a wave in the arena, Obama himself got a cheer from Princeton fans — and one he seemed visibly embarrassed over: “Four more years! Four more years!”

Hearing the chant, a smiling Obama tossed a gaze to the vocal portion of the crowd and immediately invoked the “cut it out” gesture, slicing his hand in front of his neck:

TIME reporter Zeke Miller notes the chants came from the Princeton student section.