The Adventures of Figaro Pho S01E13 - Fear of Shrinking (Reducophobia)

Figaro finds a secret box that contains a jar with a shrunken head and a native blowpipe. When Figaro tries it out, the dart ricochets off a wall and sticks in Figaro's neck. Noticing that the shrunken head also has a dart in its neck, Figaro is immediately terrified that he is going to shrink – and so he does!
Tiny, terrified Figaro wanders through his house. Things take a very nasty turn when a hungry spider finds him. With a friendly fly acting as his airplane, will Figaro escape?
Can Boris save the day with his nasty smelling super growing fertilizer?