When Ethel and Fred come up and Ricky is trying to explain that Lucy is stuck, first Ricky says "She's stuck!" Then Ethel with "She's stuck?". Right before Fred delivers his line, you hear someone off stage yell out "Yeah, she's stuck!" Possibly someone in the audience.
Ricky: Honey, I'd love to dance with you, but I've been standing on my feet all day long.
Lucy: Of course you have, dear. Do you want to take off your shoes?
Ricky: I'd like to take off my feet.
Lucy: Let's face it, I'm a seagoing sorehead.
Lucy: (to dog) I always knew you were my best friend, but I didn't know you'd be my only one.
Lucy: Ethel, what's the name of this boat?
Ethel: The SS Constitution, why?
Lucy: From the way everyone's paired up I thought maybe it was the SS Noah's Ark.
Ethel: Oh boy. If the sea air affects him like this when we get back to New York, I'm going to sell the apartment building and buy a houseboat.
Ethel: The love bug has bitten my Freddie.
Lucy: The love bug? I thought Fred had been vaccinated for that.
Lucy: I can't afford to offend you.
Ethel: That's all right. I can't afford to be offended.
Lucy: Some second honeymoon. I'm not even going to see my husband for five days.
Lucy: Can't you ping one little pong?
Ethel: Just what you always wanted on your second honeymoon - a chaperone.
Lucy: I can just see the two of you after a couple days at sea, standing at the rail in the moonlight and you'll be holding his hand.
Ethel: If we're standing by the rail, I'll be holding his head. Or he'll be maneuvering to throw me overboard.
Song: "Cielito Lindo"