I'm not sure there is such a thing Berry but I occasionally do it at the corners of a piece where I'm likely to get tearout especially on tearout prone woods like red cedar. I'm not really sure how you mean that though. Are you routing a profile or cutting the shape out of a larger piece? Normally you should be starting from the right side of the table and feed the piece into the bit and then rotate it. Can you give more details?
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.