Okay.... this was going great. It was a funny episode with great gags, and suddenly GRANDPA'S EYEBALLS POP OUT! WTH? I decided to let it slide and then I was creeped out by the old dudes playting with their eyeballs. But then the eyegags kinda clamed down a bit (I liked Grandpa's scude diving mask) and I was able to enojy the ending.
Best gags: Coyote & Roadrunner, Hans Moleman being carired by an eagle, "You're the fishtank!", cranky Grandpa, the fish eating the shark, "erection, de-erection...", Burns Vs. waves, Bart in the bag & the staged scene with Homer, Lenny & Carl.
EDIT: What's up with oddly haired Cookie Kwan & Lindsey Neagle? ().Behind Bumblebee Man
I think they were meant to be non cast characters. Like Filmation would use guest characters and recycle them as other background characters.
For example, Dr. Kates from Batman:TAS was a one-shot person, but she was reused as background person in later episodes and had black hair in Superman:TAS.
This was an okay episode. But the eyes popping out was disgusting. The parts I did like though were the road runner and coyote spoof, Grampa saying, "You're the fish tank!", the fish eating a shark, Bart getting away from Lisa by hiding in his bag and Homer's comment of the older people having a can do attitude and people Homer's age having a won't try attitude.