Hahaha! The CIC is really getting invasive with their security screenings!
It's nothing to worry about, just a basic physical exam like sashali78 said, blood, urine, weight, blood pressure, stethoscope, balance and an eye test. And a chest Xray. They do these things like an assembly line and it's really quick. After the exam they should give you a piece of paper to add to your application(if doing an upfront).