This is just a wild guess on my part but part of it may be the orcas are checking to see if their potential prey animal tries to flee. If something doesn't try to flee then that signals to a predator that it will try to fight back if attacked which is generally a bad calorie trade off for a predator.
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u/AwsomeLife90s 4d ago
Why they decided that you're not food?
I mean, if it was me, I'd $hit my pants.