I'm going to charitably guess that you do not mean "surprising" in the common way, as in "wow, I can't explain why people don't know this laundry list of requests you are or are not required to comply with"; but rather as in "it's surprising that we find ourselves in this hellish society where citizens need to memorize a bunch of shit or else live in fear of every police interaction where they might sacrifice a right they didn't need to or vice versa and get handcuffed."
Police should not be allowed to put you in that situation, period. Then you can teach everybody that one fact, instead of an incomplete list of one-off rules (that are apparently not even easy to interpret, as demonstrated by the other replies to your comment).
> instead of an incomplete list of one-off rules (that are apparently not even easy to interpret, as demonstrated by the other replies to your comment).
Looking at the comments, I will agree that there are different interpretations of the case law I cited. But the only thing that matters is can this case law be used against you to convict you for not complying with an officer, my understanding is it can, but I am not a lawyer.
I'd love to see civil rights lawyers tackle traffic stop etiquette head on and come up with clear guidance for drivers and passengers in common situations. "Keeping your mouth shut" is a good start.