>> now that dinner is over, let's try out the piano. >> oh, good. >> i am taking requests. ♪ sunday monday happy days ♪ >> i created "happy days" not what a family really was. i thought it would be good if there were some families that didn't get divorced. >> you guys are really -- >> it wasn't by accident everybody on "happy days" hugged each other. it wasn't by accident that everybody in the family ate at the same time at the same table. >> it was a sweet, tender show. in the vein of "american graffiti." looking back on the era of the '50s with a certain affection. >> haaay! >> abc wanted fonzi's "haaay" to compete directly with jimmy "j.j." walker's "dynomite." >> cause i'm the fonz! haaay! >> catch phrases were big. >> sit on it, marvin! >> sit on out howard. >> does any one say, thank you,