He just lost his concentration after the three shots before that. Took the shot for granted and hit the inside point. We've all done it, just a tough situation for that to happen.
If that other guy could have made a ball on the break, at all, that match would have been over earlier.
100%, he started hamming it up (as usual) just before the shot on the 8.
It was interesting to see how stoic Liu was during the match. Won and played with class.