Semicolon Jeopardy

hax.js

var something = function () {
  alert("something destructive.");
}

((function(){
  alert("do it now. :D");
})());

//  Function declaration for `something` is underhanded.
//  It has no terminating semicolon, so the immediately evaluated expression,
//  which evaluates to `undefined`, is used as a parameter to immediately invoke
//  the function, whose results will be set to `something`.

//  This is one of the many reasons why semicolon insertion is bad.