Over the years, I’ve heard many children say on accident rather than by accident. Kids haven’t learned the finer points of grammar and phrasing, so it’s but one of the many mistakes they sometimes make. This is born out by the fact that I’ve never heard any child over the age of about ten say it.
Until now. I saw a U.S. John Deere television ad in which the voice-over states:
To make sure people don’t break John Deere tractors on accident, we try to break them on purpose.
I was reading at the time and my head snapped up so quickly that I surprised myself. The only good thing I can stay about this is that I now know why kids make this mistake! Is on accident accepted usage somewhere in the U.S. or should John Deere be looking for a new ad agency before they embarrass themselves further?