Commercial for Alka Seltzer; two vacationers are floating in chairs in a pool; woman: “I’m trying too hard to enjoy my vacation;” man: “last night, you gave into every temptation!” woman: “If only my head and my stomach were tough--”; man: “It’s OK, love! There’s no need to suffer!”; a group of synchronized swimmers jump out of the water behind them, and they all sing in unison: “Alka Seltzer! Plop-plop, fizz-fizz, oh, what a relief it is! Alka Seltzer! Plop-plop, fizz-fizz, oh, what a relief it is!”; end voiceover: “For headache and an upset stomach, the plop-plop, fizz-fizz is fast-fast! For heartburn alone, Alka 2 (a roll of Alka 2 rolls in next to the glass of Alka Seltzer), the one you choose...”; woman and man reappear and sing, “Oh, what a relief it is!”