The Mexican Staring Frog of Southern Sri Lanka
The teacher, Mr. Garrison, tells the boys to talk to Vietnam War veterans and write an essay.  They talk to Stan's uncle, Jimbo, and his friend, Ned, at the set of their own television show called Huntin' and Killin'. The two men tell a wild story about single-handedly defeating the entire Viet Cong army and riding a log flume ride at the amusement park section of their army camp.  To the audience, it is clear that this is a lie.  However, the boys write about this for their school essay, and their teacher, Mr. Garrison, gives them low grades and detention.