I was in a technical interview for a web development position. When it was time for them to choose a question they showed me this:

How can you make this code display 0 to 9 correctly?
for (var i=0; i < 10; i++){
setTimeout(function(){
console.log(i);
}, 1000);
}

When I saw the question I instantly smiled and rubbed my hands ready to answer since I knew exactly the answer and they told me:
"Oh you looked already familiar to this one, we'll choose another for you"

I legit stood up and left the fucking interview right there.