Gracie, while he was stuck in the armbar, had a calm face, but it looked to me like a strong minded warrior with tons of family pride thinking of 'a happy place' to block out the pain.
Royce Gracie will never ever tap IMO.
No matter what.
Ever.
I feel totally confident in that prediction.
Hughes could have broken his arms & legs OFF & he wouldn't have tapped.

...Well... err... of course he wouldn't be able to then, would he.