 When the family arrives in Manhattan , they decide to split up . Upon arrival at his car , Homer discovers it has been issued many parking tickets and has been wheel clamped . While waiting for a parking officer to come remove the clamp , Homer drinks an excessive amount of crab juice from a food vendor and needs to urinate , but is afraid to leave his car behind . After several hours of holding it in , he finally goes to the restroom at the South Tower 's indoor observation deck , but discovers that it is out of order and must use the one at the top of the North Tower . While he is doing that , the officer arrives at the car and finding no one present , issues another ticket and leaves ; Homer 's subsequent " D 'oh ! " echoes across the city . Meanwhile , the rest of the family tours the Statue of Liberty , Little Italy , Chinatown , and the Empire State Building . Bart leaves the group to visit the offices of Mad magazine , and is in awe when he sees Alfred E. Neuman . The family attends a Broadway musical about the Betty Ford Clinic , and then take a carriage through Central Park to where they are planning to meet Homer . 
