At one time,here in the UK, it was compulsory to have to move up a class if you got two promotion scores (60% of that possible) in a season.
One old boy,very comfortable in your equivalent of advanced, became a past master at just doing not quite well enough'to avoid the promotion he didn't want.
Then,to his horror, due to an inexperienced judge, he accidentally got a second promotion score.
We all watched with interest when he started his first flight at what would now be called FAI, complete with a rather fast model and his usual, long standing caller.

The flight was unusual, erratic, and more exciting than usual to say the least, accompanied by pilot/caller comments such as
"WHAT!" "ARE YOU SURE?", "THAT'S NOT IT", and finally, from the caller, "WELL THAT'S WHAT IT SAYS HERE!"

It turned out that the caller was reading from the FAI schedule of the previous year,and the pilot had practised the new,correct,one.