Phineas and Ferb decide to build an observatory in honor of Comet Kermillian's appearance; Candace goes on a picnic with Jeremy only to have his little sister get in her way; and Linda and Lawrence try to buy steaks for an evening cookout...but Dr. Doofenshmirtz has bought up all the steaks in Danville.
* HairReboot: While testing the laser, Ferb accidentally burns off one of the strands in Phineas' hair, who comments, "new hairdo, check it out." However, just a few shots later, the strand is fully grown again.
* SquirrelsInMyPants: The TropeNamer; this is one of the torments inflicted on Candace by Li'l Suzy.
* ThisIsNoTimeToPanic: When the observatory threatens to collapse thanks to Doof's death ray, Phineas says this to the audience. Then a piece of the roof nearly lands on him, and he says "Okay, ''now'' you can panic."
-->'''Isabella:''' You had me at "our grandchildren"...
-->'''Isabella:''' Steaks! You had me at "steaks"!
* VisualPun: "We just keep getting served."