We discussed the moving flag footage a number of years ago, but I think it went away with one of the demises of Apollohoax. We drew the conclusion there that it was most likely electrostatic attraction for the same reasons as Svector has outlined.
ALSJ tests the hypothesis of direct contact and is unable to falsify it photogrammetrically.
Some conspiracists offer the fluid wake hypothesis, but give no evidence other than coincident observation. However, I agree that the effect does precede the cause, and that the flag is drawn toward the astronaut before he passes it. Both the direction and timing of the alleged reaction are inconsistent with a fluid wake. I was unable to duplicate any such fluid wake effect with my own flag mockup.
I tend to believe the timing and direction also falsifies the direct contact hypothesis.
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