South Park (1997)

S2E6 The Mexican Staring Frog of Southern Sri Lanka

Mr. Garrison tasks the boys with learning about Vietnam from someone familiar. Stan's Uncle Jimbo and his buddy Ned share their wild story with them. Skeptical of their account, Mr. Garrison dismisses the boys' report and hands out detention. In retaliation against Stan's Uncle, the boys devise a plan to send them a fake video featuring the Mexican Staring Frog of Southern Sri Lanka.