I live in USA and have heard some doozies :o
Friend on meeting my parents who were over from Scotland to visit.
"So did you drive or take the train"
Father " we flew,you cant drive here from there,theres an ocean"
Friend " really? and no bridge? thats odd,Scotland right off Canada isnt it?
Father 
Intelligent college educated woman
Another intelligent college educated friend
"I want to go to Australia,Id love to see lions,tigers and giraffes in the wild"
Me "HA HA HA" you numpty "HA HA HA"
Friend " what"
Me"they dont live wild in Australia"
Friend " Im pretty sure they do,are you sure ?"
I have a lot of college educated numpty friends,yet another one talking to a patient
patient " Im off to Fiji next week for a vacation"
friend " Thats off the coast of Oregon isnt it? "
Another lady I met told me I spoke pretty good English :o
Another didnt believe that in Scotland we didnt spent our lives sitting 1/2 way up a mountain making tweed all day,didnt realise we had jobs just like people in the USA
Constant source of amusement for me :o
Oh the knife thing is true btw,people here CANNOT use them and cut everything ( except steak,that is cut with a knife held awkwardly in the wrong hand ) with the edge of their fork :o