I once asked a longtime DPE about any memorable moments in his career as an examiner. One was that an applicant flew to him, his home airport, and passed the exam no problem. On the return flight, literally with wet ink on his Temp certificate, the new private pilot, apparently excited, entered and followed a GPS beeline "FML" back to his home airport. The big problem was that it was right through the middle of a very busy Class B airspace... It was so absurd that the examiner was OK, though I think the new pilot earned himself a 709 ride.