Spoiler Warning:Plot twists, ending details, etc. are included in the plot. You have been warned.
Summary
Spinelli borrows Vince's lucky marble to pass a math test on the day Vince needs it most. It was Vince's good luck charm; it only ever appeared in this episode.
Main Story
Vince shows the rest of the gang his marble, telling them that he is using it to try and win the football game, defeating The Boot, a kid who kicks the ball very far.
Spinelli borrows it to pass a test; she aces the test and starts testing the abilities of the marble. She does so in games like hoops and skipping, before dropping it. When she tells Vince, he forgives her because he got a new good luck charm: a shiny nickel.
Goofs
Animation/continuity error: In the first scene, after Vince kicks the football, most of the gang is shown cheering with T.J. in front of Mikey. After perspective changes, Mikey disappears.
Animation/consistency error: While Vince is talking to Lawson, Vince's head is much bigger than usual.
Animation/consistency error: When Spinelli is taking her math test, she is shown wearing socks instead of leggings.
Coloring/continuity error: After Ashley A. Finishes jump-roping, her sleeves are pink instead of grey.
Animation/continuity error: While Ashley A. is jump-roping, she is not wearing any backpack. After Spinelli talks to her, Ashley A. is wearing a backpack.
Animation/continuity/coloring error: When Spinelli is jump-roping with the Ashleys, Ashley B. and Ashley Q.'s faces switch from being closed-mouthed to open-mouthed in every shot.
Coloring/continuity error: After the basketball went into the hoop, the basketball is transparent for the last few frames.
Animation/consistency error: When Spinelli uses Gretchen's bow as a blindfold, when Gretchen says that the chances of Spinelli making the shot is astronomical, she has her bow on, although Spinelli is still using it as a blindfold.
Trivia
Regular
This episode tests sociological questions of religion and superstition.