The more I watch it the more I think the same thing.
He bounced straight back up and tried to get the ball.
If it had been a dive surely he would have stayed down.
I personally think he dived, realised he had made a tit out of himself and shot back up instantly because he knew it was wrong - hence no appeal. Not for a second do I think he lost his balance as he left his leg hanging in mid air hoping for a tackle. Hopefully it will be the first and last time we see it happen anyway.