Presenting Medusa

It was presentation day and I have to say I started off really well but then the instructor interrupted me to point out that there was a typo on one of my presentation slides and I lost my confidence. I started getting flustered, forgot where I left off and didn't know where to start again. Correct me if I am wrong but I don't think I should have been interrupted. She could have waited until I finished saying my short intro and then brought it to my attention.

She also said I should have used 2 boards instead of one because it looks too crowded. Okay, I can see that.