The bit that was shown was very stagey, and it was funny.
Tiff went in to 'sort it out' in some very American 'confrontation' way, her role 'Big Bad Wolf'.
John realised this and, during this clip, he seems to respond with the role 'Mafia type psycho villain' - 'Do you want a deal?' complete with faint American accent.
There's an acknowledgement there that they are both 'acting a role', although John's was in response to Tiffs.
In the long conversation, they moved in and out of this 'posturing', Tiff would 'act' the powerdiva and then John undercut the performance with doses of ordinary reality. Tiff would then come off it and talk honestly for a bit.
It was fascinating - but there was a massive effort there to actually cut the crap, acknowledge each other and try to actually communicate on a real level.
Great fun to watch, and a very sort of sophisticated piece of 'confrontational sparring' - so much better than Gemma's self promoting pronouncements and long, boring, crappy declamations about 'how she is' - Tiff and John were in a different LEAGUE.
Of course they edited it to get the 'evil mastermind' effect, but it was far more complex than that.