Laminating Pride

Today put laminating film on this school's laminator the first time- all last year my assistant did it.  Of course, because it's the beginning of the school year there's a huge pile of stuff to be laminated.  I think I've finally got it when my former assistant walks in.  She takes one look at it, announces I've done it all wrong, and tries to bump me out of the way to do it for me.  I calmly, but firmly tell her I can do it myself.  Another teacher hears me say this and comments that a lot of people are waiting on their stuff and I should just let go of my pride and have her show me how to do it.  I pretend I don't hear her.  After 15 minutes of rereading the directions, I realize that I had it right all along.