JOE AND JOHN ARE IDENTICAL TWINS. THEY WALK IN A BAR AND ASK FOR THE SAME DRINK. JOE DRINKS IT FAST, AND JOHN DRINKS IT SLOW. THE BAR TENDER HATES JOHN AND WANTS TO KILL HIM. THE NEXT DAY JOE AND JOHN WALK IN THE BAR AGAIN. THEY ORDER THE SAME DRINK AGAIN. JOE DRINKS IT FAST AND JOHN DRINKS IT SLOW. SUDDENLY JOHN DIE'S. HOW DID THE BARTENDER PULL THIS OFF; THIS IS A RIDDLE