The song White Rabbit by Jefferson Airplane plays briefly when the Hemp purse is burning and the scent is transferred through the ventilation shaft. This song was also used in a previous episode, "Midnight Rx".
When Homer parachutes down to his family using a Union Jack (Flag of the United Kingdom) parachute, James Bond style music plays.
The Stuff n' Hug store is a parody of Build a Bear Workshop.
This episode is widely considered one of the most tragic episode of The Simpsons because of Mona Simpson's death.
Ironically, Lisa stealing Mona's earrings and giving up on the mountain climb are signs of the rebellious spirit she gave Lisa.
This episode marks the final return and death of Mona Simpson.
This episode was dedicated to Elise Castellaneta (Dan Castellaneta's mother) and Dora K. Warren (Harry Shearer‘s mother).
This episode premiered 4 days before The Simpsons Rideopened at Universal Studios Florida and 8 days before the Hollywood one opened.
During the ESPY Awards, Lance Armstrong is offended by a joke Fozzie Bear makes about his trousers, grabs the Fozzie puppet and throws it across the room to reveal a single arm and hand underneath. However, the way the Fozzie puppet is designed is that the performer uses his right hand to work Fozzie's mouth and his left to operate Fozzie's left arm and hand (as he's a glove puppet), and Fozzie was seen using his left arm before Lance threw the puppet away.
Only Homer and Abe attend Mona's funeral, along with Seth, Munchie, and Mason Fairbanks. While the rest of the Simpson family is no where to be found.
The Simpsons family returns from the Stuff n' Hug store in the evening, but as Homer walks into the kitchen, spinning the "Defender", he stops next to a window and the sky outside is much brighter.
If the recording bears would play the message only if you would press their button then how could they offend Homer (by saying whatever had Bart recorded) just when he entered the place without someone pushing their buttons?
Homer is surprised that his mother is alive, but in while reading the newspaper solving the "message" IMOK (I am OK) he alredy had a theory that his mom didn't die while the prison bus dropped off the cliff. However, it possibly was due to the fact that Homer didn't anticipate her coming back to him.