It's the balcony on the builder's yard overlooking Victoria Street, across the road from Elliotts & Sons, its been there for years, heck, Tina's not even the first person to fall off it

I was shocked that it ended up as Rob, though he did get a bit angry part way through the episode last night.
i had't read about the "shock" but will be interesting to watch tonight.

I just watched the clip from Good Morning Britain, Marc teased the big twist tonight saying he can't say much.
http://www.itv.com/goodmorningbritai...-corrie-killer

How can Tina survive that fall? no human being could surive that

All the fake tan saved her.

Who cares, Tina is an irrelevant character.

Good thinking as I don't want Rob to be the one who killed her

Wouldn't her body have completely different injuries from being run over to falling.
Couldn't tony just say through he was driving his van somewhere through.
Twist not that shocking through as it wont be the cliff-hanger of an episode.

I thought she wasn't dead yet but Carla finishes her off and then frames Peter.

Although I'm not disputing MK has a very sweet little face but does that equate to greatness in acting?

I'm with you on the Mark Wright issue. Sitting next to her at awards ceremonies and pics of him on set. Why?

Ronseal has a 10 year guarantee.

Carla's gonna find the body and be framed.

Two words.. John Stape

If Tina does suffer a deliberate (this time) attack I don't think we will be shown who is responsible - because it seems to me they have set the stage for a number of characters to be in the frame and want to create a whodunnit scenario.

She either get run over by the van Tracey/Tony drive or someone pulls the plug on her life support machine

I'm still hoping the twist means Tony's responsible. I've really grown to like Rob and his pairing with Tracy has been great for both characters as well as his relationship with Carla and scenes with Dreary and Peter. (I love the Barlow/Baldwin esque feud they have going on)

I think this whole story would've been more believable with Michelle Connor playing Tina's role; she and Peter have history, Rob's always held a torch for her; Carla's her bff and Steve would be left to grieve her. (His mother's boyfriend would deliver the fatal blow, Rob believing he'd killed her)

Tina and Tommy would marry, she'd get pregnant and they'd get their fairytale ending. (He should've never been sacked)

Rob will think he killed her, but I think Tony/Tracy will be the ones to kill her, they run her over. They then get rid of the van and dodgy goods, and I think that might explain the pics we saw earlier this week, where there was a big tent covering everything.
Peter will get framed for it, Roy saw him arguing with Tina, as well as seeing him leave the house and the scratch on his face, he will certainly get blamed for it.

As this is corrie recently the twist will probably be she gets up again and rob attacks her to keep her quiet while by Tracey and Tony.

I think Tony heard everything, Tina is alive he hits her with a weapon, this will be the injury she dies from but Rob will continue to think it is all his fault.

I think that Rob sets up Peter and gets him arrested for the murder of Tina and its one way of getting rid him because he hates him and he does not want Carla to get hurt also Tracey will find out what Rob did and will cover for him by backing up his story but she knows the police will question her andd she has not got an alibi on where she was as she was unloading dodgy goods so knowing Tracey she will lets Peter go down instead of Rob
Also they will be CCTV about so Rob will have to get the tapes and edit it the video so it will show that Peter was the one that killed her because video will show Peter following her into her flat and also the part where goes into the flat as well
so Peter will go down as he is leaving the show for a while and Rob and Tracey will get away with it as they cant afford to go down themselves as they have criminal records

Didn't someone (possibly David) throw things at someone/some people from that balcony in one of his rants?

I think Roy will come out the flat and shoot her in the head Breaking Bad style, before telling Rob to run

...or the "shocking" twist is just that she isn't dead yet

Most likely. We just can't get rid of her. Every time it looks like she's had her exit, she comes back.