I keep a record of some of the ridiculous things my students have said over the years. I got a new entry today.- "How far is NJ?"
Me-"Do you mean how long is NJ?"
"No, how far is it, like how long will it take to get there?"
Me- after a long pause...."It's not far at all...you will be there in no time"
Then the laughter from the rest of the class kicks in. (My school is in NJ)