Thomas consumes a dangerously cold Cool Cubed slushy while Mordecai, Rigby, and Pops egg him on. After finishing the Cool Cubed, Thomas gets a brain freeze that leaves him unable to move. Mordecai, Rigby, and Pops try to thaw Thomas out with a hot shower, which fails. They take Thomas to Skips for help, then they call Dr. Henry. Dr. Henry uses a device to shrink Mordecai and Rigby to microscopic sizes, then teleports them into Thomas's brain. After a struggle with the physical form his brain freeze has taken, Mordecai drops some dynamite at the core of Thomas's brain. The explosion saves Thomas from being permanently frozen, then Mordecai and Rigby are teleported back outside Thomas's brain. Thomas instantly regains consciousness, but then complains of a headache that resulted from having been thawed out.
—Thomas Palof