Police Academy ending explained (spoilers)

[Colindelia]

The riot leader has Lieutenant Harris held hostage on top of a building. Mahoney tries to save him, but ends up being held hostage too. They are saved by the surprise reappearance of Hightower, who punches the riot leader down a flight of stairs, where he is held at bay by Hooks, who finally finds her shouting voice. Barbara beats up the four guys from the beginning of the movie who threw his film stand into the river. Tackleberry gets pissed that he missed the shooting. At the academy graduation ceremony, Hightower and Mahoney receive a special heroism award, and Mahoney is visited by the podium hooker during his acceptance speech, which ends the movie. As an aside, as they are trying to escape the rioters, Copeland and Blanks duck into a back alley door, and it ends up being the Blue Oyster again.