Two excellent old comedies
The first is a Marx Brothers film from 1931, written by Wlll B. Johnstone and S.J. Perelman, in which the brothers play stowaways on a ship. The plot itself involves gangsters and kidnapping and a good girl and a bad girl (played by Thelma Todd, who did 'bad girl' supremely well) but it's most memorable for the routines in which they try to evade the ship's authorities. Perhaps the best-known bit is when Zeppo, in his funniest screen moment, steals Maurice Chevalier's passport and they all try to pass themselves off as him as they disembark.
The second is a 1952 Howard Hawks pic starring Cary Grant and Ginger Rogers. Grant plays a chemist who develops a youth formula. He is testing it on a chimpanzee who surreptitiously dumps it in the water cooler. When Grant and his wife (Rogers) drink it, they regress mentally, behaving first like wild teenagers and then stubborn children. Ginger Rogers was a brilliant comedienne, something I wasn't aware of before I saw this movie. Marilyn Monroe plays the boss' secretary ("Anyone can type," he says as she sways out the door) whom the teenaged Grant takes on a joyride.