One of the best tech talk i have heard so far. Closure and Expando classes are covered in depth.
I wish Groovy was more like Lisp(Clojure), Io(Ioke), or Smalltalk that'd make metaprogramming much more easier and viable.
so it's like massively over complicated javascript
Just hands-down phenomenal talk!! Every second watching this was a second well spent. Great job!!