Meanwhile, Zim was just getting home from Skool. GIR was being… GIR… as usual. Bouncing off the walls while "The Angry Monkey Show" blared. "GIR!" shouted Zim as he took off his disguise. GIR jumped down from the ceiling in Duty Mode. "Yes, master?" he replied. "GIR, something strange is going on. Dib wasn't at Skool today. He must be planning something. Search the base for signs of that miserable little Earth-Monkey." GIR immediately went out of Duty Mode. "No need!"
"What do you mean?"
"Dib left."
"Huh?"
"Dib's dad took him on vacation."
"What?! I must locate him. If he's got something planned. I must be ready!"
Zim immediately went to his lab. "Computer, locate the Dib-Human," said Zim as he sat down. "Scanning…" replied his computer, "Dib located. Location: Gravity Falls, Oregon."
"Hmm… Gravity Falls… Why does that sound so familiar?"
Suddenly, GIR came down the tube to the lab. "I just flushed myself down the toilet!" he said with glee. "GIR, warm up the Voot Cruiser. We're going to Gravity Falls."