Other mistake: Private Pyle seems to be just as large in the bathroom scene with Hartman as he is in the Jelly Donut scene. In reality, it's just the same actor, but in the film's plot it implies he went through 12-22 weeks of boot camp under Hartman without ever losing any weight, even though Hartman was specifically trying to get him to.
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Suggested correction: There's a simple answer: Hartman failed to get Pyle to lose weight. Technically, Hartman was trying to get Pyle to graduate, regardless of his weight, which was achieved.
Continuity mistake: The shape of the beam of light coming from Joker's torch, after he enters the bathroom where Pyle kills himself, is different from the shape of the beam before he enters.
