I really wish people would stop calling this language JavaScript. It's not. Its proper name is UnityScript, and it's more like Jscript.NET than anything else.
I usually don't mind that much when the wrong terminology and naming is used, but this specific case was a disservice for me. I was very confused to see the syntaxe he used, yet calling it JavaScript; I thought they used a modified JS syntaxe, possibly pre-compiling it to the C# equivalent.