I am not sure if you happened to experience a very low probability situation or event in life which you can compare with winnnig a lottery or getting struck by thunder. Statistically the second one has more chance. To explain the same I take to you to recent past...
I had that bizarre experience in the month on December while returning from work took a bus. There was one gentleman very well groomed of dark complexion And I met the same person next day (Saturday) in a different bus while going out. I could not believe myself as that person did get down well ahead of me. And I do not recollect that person from my earlier experience of three years when I used the same bus. I do not deny finding the same faces in my bus. But that is while going towards the same direction at almost same time.
Now coming back today; I found yesterday around 10:30 PM (Paris Time) some one posted in a web groups of having some mock test for the exam I was taking today with Prometric. So I sent a desperate email to him asking for eleventh hour help if he can share the same. And to my utter surprise he sent it and I passed the exam while taking it at home.
When I started my test at the computer to my utter surprise all the questions and their respective options were excatly the true copy of what I received in the morning. It was deja vu & I passed with 100% score.
Well it was a big luck or mercy of God. Its a mere chance of finding that web forum in 11th hour and that person really replies with help. He could have been on vacation or could have crashed his hard drive or my question set could be a real hard one :( but it just happened :D
This is just another reason I do not like too much stress on certification on resume as it sometimes might give you a wrong picture about the person strength and skill sets when you evaluate his/her resume. Now a days all big companies are making big bucks on certifications and all the head-hunters are asking for the same.