EPTReplay: http://repdepot.net/replay.php?id=19114
How I discovered this:
I was in the middle of a regular TvP, but I had to go out to the mall to buy something. My mom told me that she would give me the ride. She then calls my cellphone and tells me to get ready in 5 minutes.
Being at C level and one game loss is -75 points I really don't want to just leave, so I go all-in.
What you need:
-1 factory
-Natural CC
-Around 24 SCVs
-6 tanks with siege mode
What to do:
Select all SCVs and tanks and ATTACK with a ee han timing push. 1a2a3a will probably win you the game, since SCVs > Probes and Tanks > Dragoons.
However this ONLY works at a certain point so you can't let Protoss mass a certain amount of dragoons or it could be harder to beat. In my replay, the Protoss opts to go reaver and fails badly, doing no damage whatsoever. With this advantage and 0 tank loss, I go all-in.
A hard counter to this rush is DT. No detection while fighting and you're basically fucked. Although when you fight inside his base you can build a turret if you have the amount of minerals to do so.
Stronger than the 2factory build IMO, the tank+SCV force is too strong.
Final Note:
+ Show Spoiler +
This was made for fun! I'm pretty sure this won't work in the upper levels. I myself was pretty surprised this worked ^^ Made this topic for the kicks and laughs 
He would always pull a bunch of scvs when he pushed. 
