Many years ago I was sent on a course to learn AS3. The morning the course started the first thing the teacher said was that their marketing department was ahead of the teachers and so the course will not be taught for AS3 but AS2 and that AS3 is like AS2. No asshole AS3 is not like AS2! Maybe in some basics but AS3 is fully OO and AS2 is not. I ended up telling the teacher stuff he didn't know yet about AS2 and AS3. What a fucking bummer.