<P> At Lt. Harris' request, Blankes and Copeland try to learn where a weekend party, organized by Mahoney, is going to be held, to investigate it for any cadet unlawful behavior . Wary that they're using an intimidated Barbara to force him to reveal where the party is, Mahoney tricks Blankes and Copeland into attending a party at the Blue Oyster gay bar where the horrified men are intimidated into dancing the whole night . Mahoney's party turns out to be relatively sedate . </P> <P> At night, Martin tries to sneak into the women's bunk for some fun, as he always does, but is caught by Sgt . Callahan . He is pulled into a room by Callahan and she throws him on the bed, pounces on him and they have sex . The next day, after a voice training exercise, Martin confides to Mahoney that he had fallen in love with Sgt . Callahan and that he speaks with a fake Spanish accent in order to get girls . </P> <P> Mahoney helps Hightower prepare for a critical driving test . They go for a practice drive the night before the exam by stealing cadet Copeland's car . They are chased by the police for crashing into another car and speeding, but Hightower manages to escape and in the process greatly sharpens his driving skills . After he passes the driving test, Hightower is very thankful to Mahoney . Unfortunately, immediately afterwards, when Copeland racially insults fellow cadet Laverne Hooks (Marion Ramsey) for accidentally running over his feet during her driving test, Hightower is offended and lifts and overturns the police car in which Copeland is seated, despite Harris' demands and Hooks' pleas for him to stop . This leads Harris to promptly eject Hightower from the academy, much to Mahoney and many of the other cadets' dismay . </P> <P> Shortly after this, Mahoney and Barbara are having lunch in the cafeteria and talking about Hightower's expulsion . Mahoney is finally fed up with the academy, but refuses to quit . Blankes and Copeland attempt to get Mahoney to fight them so they can give Harris a reason to expel him, but Mahoney resists . Having enough of their misconduct towards Mahoney, Barbara stands up for him and shocks everyone by throwing the first punch, hitting Copeland with a lunch tray . After watching Copeland faint, an offended Blankes punches Barbara back for foiling them, which promptly gets Mahoney involved in a brawl with him . After the fight, when Lt. Harris asks them who started the fight, Blankes originally told him that Barbara started it by hitting Copeland with a lunch tray . While cleaning his baton, Lt. Harris nonchalantly decides to expel the latter along with his dog . Soon Mahoney convinces Blankes to let him take the blame for throwing the first punch to protect Barbara, which finally gives Harris the green light to expel his most despised cadet . </P>

What does mahoney teach hightower to do in the movie 'policy academy'