The phrase is a noun phrase, and it is incorrectly incorporated into your sentence. Perhaps: I intended to go to the movies tonight, but like a bolt from the blue , my teacher suddenly want us to take a test tomorrow.
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Vctory Onga bolt from the blue= an accident happen suddenlyLiterally it means a bolt of lightning from blue sky. Would you expect lighting to come from a cloudless sky? Of course, it is a figurative expression. It frequently refers to an idea that comes to us - very fast, with a lot of energy (or impact), and totally unexpected.