* Simple: The complicated instructions left me completely flummoxed.
* With context: When the magician pulled a rabbit out of his hat, the children were flummoxed.
* Figurative: The sudden change in plans flummoxed our carefully laid out itinerary.
* Formal: The professor's lecture on quantum physics flummoxed even the most advanced students.
Remember, "flummoxed" means confused or bewildered. You can use it to describe someone who is puzzled, perplexed, or baffled.