What sort of things? Threats? Some things are simple. I work with contracts daily, and if somebody tried telling me that I had to sign one that I completely did not want to sign, a contract I would be 'gutted' about if I did sign, and had no reason to sign it whatsoever; there is nothing they could say other than threaten me with something that could do it. 22 year old young lad maybe, but that doesn't mean he has the brain of a 3 year old.
We already know that he wasn't gutted about the move at all because he was seen via fly on the wall coverage on Liverpool TV arriving and wandering round the place practically hopping with excitement, he was unmistakably happy.
So do I, but it's an entirely different environment. Carroll would have known very little (if not **** all) about transfer dealing as he's a young lad and he had never actually been a part of one before (came up through the youth system). So with hours to go before the deadline, he was in a closed room with Llambias, Ashley and Carroll's own agent who was set to make millions of pounds if Andy signed the deal.
I've had to deal with some heavy-handed sales pressure in my time but **** me. When it's off record you just don't know what was said. I mean really, who was the guy Andy had for all of his transfer and legal advice? That's right, his agent. The guy set to make millions for a couple of hours work.
Also, if Carroll did want to leave he would want to look good on both sides, what's to stop him just telling his friends he didnt want to leave to try to save face with supporters, which is exactly what Barton did (admittedly he was far more public and clever with his PR).
http://www.nufcblog.com/2011/02/01/the-text-messages-between-steve-wraith-and-andy-carroll/
And the guy I spoke to knew the story, so hey, perhaps he did? Barton is obviously a nutter though. He'd take on everyone on the planet if he could. You see a lot of players seemingly unhappy with situations at clubs, but none of them go to the lengths Barton did while he was still an employee of the club. That's a one in a million case.
Didn't we reject an initial offer of £30m from Liverpool? I still think that if Ashley and Llambias wanted Carroll to go they would have accepted that bid straight away.
I'd imagine that forcing a player out is a high-risk move, so Llambias and his agent may have accepted Carroll's stance until the sum got so high they thought "**** it, you're going".
In the words of Derek Llambias himself:
You guys don't understand how ****ing horrible we can be

Well put.
Give it up man, it's done and dusted and nothing can change that.