Examiner "Distractions" During Checkride

Hi all,

My checkride is a long way off, but this evening I read the PTS for
Gliders for the first time. I noticed this section:

"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 a realistic distraction during the flight portion
of the practical test to evaluate the applicant’s ability to divide
attention while maintaining safe flight."

Obviously, the Examiner isn't going to do anything dangerous, but what
sorts of distractions have people encountered? It is obvious when the
distraction occurs....or is it something subtle?

--Michael