Reminds me when a former boss told me to be more pacific...she was so confused when I said "like the ocean?" I'd never heard anyone misuse that word before.
Another time a girl I worked with that, for some reason touted her English degree, used the word irregardless (which, holy poop, google corrected my spelling of) and I advised that she used a word that doesn't exist. She was also very confused.
I'm horrible at grammar, but some people take it to unpossible depths.