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Barry Kripke severely embarrasses Sheldon on National Public Radio's talk show Science Friday by filling Sheldon's office with helium so that his voice is higher pitched than usual. While at first pouting and announcing defeat, Leonard and Raj (originally enjoying the prank), convince Sheldon to fight back. Sheldon takes vengeance on Kripke with an elaborate trap in which a massive cloud of gooey foam, to be set off by a human presence in Kripke's office, falls through the ceiling into Kripke's office, effectively covering him in foam. However, the trick backfires on him when the visiting Caltech president and board of directors are also hit, thanks to Sheldon's lack of an "abort" system. Sheldon gives himself away with a pre-recorded video stating that he sent the taped trick to YouTube, and proclaim...


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