Purposeful mistakes to attaract attention

I remember my first year of college when i was new to the world of presentations, seminars, reports , viva etc. I was always afraid of the query round. Mostly because i did not want to fall prey to some top brain who knows all about the topic. I started using this trick that i had learned by mistake.
I started making purposeful, noticeable silly mistakes just hoping to attract attention. Once the mistake caught eyeballs or vice versa, i felt relaxed. I could now eat up the query time explaining or justifying the mistake. Like if i wanted the jury to ask me more about slide 1 than slide 2, i used to make a simple mistake on slide 1.
It is more likely that people will point to your mistake in such a situation than your so called correct points. The mistake can be anything like spelling mistakes, data error etc.
But when i really made a mistake by mistake, i would just say that it was a purposeful mistake, just to find out whether anybody reads these long reports or not.

In professional world you can do purposeful mistakes and gain from it. Just be thankful to the person who pointed out the mistake and then build a relation from there. Its like making a relation from an error. To start a relation you should have some bond and this error just worked as that bond; you made it, he noticed it.