StarCraft 2 Marines Rush destroys HuShang Terran build order

this is a video response to HuShang Terran build order video found here:
Learn Starcraft 2: EASY Beginner Terr...
As you can see, unless you modify his build order to get some kind of defense before the 2:45 mark, you're getting destroyed.  HuShang of course, has yet to reply.  He's too proud of his build order to see the flaw.