The number one reason why you may encounter little more than a bemused stare following a pattern-interrupt, is poor timing. This is not a case of being a millisecond out, or failing to flow smoothly like an aikido master. I am talking more about what you do following the pattern interrupt.
If you just stand there, waiting to see if it ‘worked,’ you will more than likely be disappointed. Your partner is looking for you to provide them with an explanation and direction. If you simply provide a look that says, “Don’t ask me, I don’t even know if I did it right!” you will soon lose your opportunity.
Just let things flow smoothly. More often than not, even if the pattern interrupt did not ‘take,’ you will manage to pace and lead your partner if your suggestions are confident and congruent.