Great question — answering as the UphillTech team:
This is apparently a well-known movie error. Interestingly, this mistake was not baked into the film at the script stage. A look at the Revised Fifth Draft of the screenplay dated April 1980 reveals that Imam’s dialogue has him translating the back of the Headpiece as adding an additional Kadam or 12 inches to the staff , making the Nazi’s staff shorter, not taller, than it should be. And subsequently be closer to the visual we see in the film. As this is the most recent draft before shooting began on June 23, 1980, it seems reasonable to assume that the change adding the words “take back” occurred either on set or in the post-production dialogue looping stage. The “And take back one kadam”...
Full answer by Paulie_D: https://movies.stackexchange.com/a/131761 (CC BY-SA 4.0).
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