Haha, that is ... wow. Just plain stupid. And funny. How does she not have a clue what film is? People that age, while young, are old enough to remember what "film" is. I've never come across somebody who didn't know what film was, unless they were really young. A 5 year old may not know what film is, and understandably so, but an 18 year old? Please. Only thing I can think of is really bad memory or just plain oblivious.
Thanks for the good laugh, though.