Sometimes, a plot theme is explored in several films.
One such theme is “data mining,” for want of a better term.
To satisfy his personal curiosity, the protagonist deeply explores a previously gathered record of an event using his professional techniques, and makes an important discovery. Watching the professional protagonist going about his task for personal reasons is quite interesting.
“Blowup” (1966): Photography. He blows up photographs and explores details in the background.
“The Conversation” (1974) Audio. He uses various audiotape editing techniques.
“Blow Out” (1981) Both photography and audio. He synchronizes a sequence of magazine photographs with his own audio.
I just could not suspend my disbelief in the “Blow Out” sequence where he creates a few seconds of motion out of magazine photographs. Even 1 second of motion would require 20 plus photographs, taken in sequence. I find it hard to believe that he could not only do that, but
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also miraculously find a “flash” in the sequence that denoted the abnormal blow out. Would this flash NOT be visible in a photograph on the magazine? How come he was only able to find it when the photographs are made into a kinescope motion sequence?? Sorry, I could not buy it.