Use of Distractions During Practical Tests
Numerous studies indicate that many accidents have occurred when the pilot has been distracted during critical phases of flight. To evaluate the applicant’s ability to utilize proper control technique while dividing attention both inside and/or outside the cockpit, the examiner shall cause realistic distractions during the flight portion of the practical test to evaluate the applicant’s ability to divide attention while maintaining safe flight.
What a bizarre idea! It'd be worth going to the US to take the PPL test just to be able to say to some prattling FAA Examiner:
"Listen, a***h*le, will you just SHUT THE F*** UP!!"