As Sylvester sorts through the garbage cans, he is humming, "A Cup of Coffee, a Sandwich, and You".
When Sylvester goes to the nurse's station to get seasick remedy for the 2nd time, Tweety pours nitroglycerin into the bottle before Sylvester enters. Sylvester then picks up the bottle and starts drinking out of it. The next shot shows Tweety on a shelf with the same bottle underneath him. Then in the next shot, the bottle is back in Sylvester's hand.