I would argue that the precedence priority is kinda a wat-moment. Most other languages[0][1] have the logical operators `and`, `or` and `not` in the lowest (or near) priority, which makes much more sense IMHO.

If you'd dismiss the above, then I guess one could also argue that JavaScript returning an empty string on `[] + []` is also not a wat moment, but just part of the JavaScript grammar.

[0] http://kevincantu.org/code/operators.html

[1] http://www.tutorialspoint.com/python/operators_precedence_ex...