Originally Posted by Seb
He did place the ball out the back of his hand before the Welsh arm pushed it back/got under it.
Not sure if you can see the video in the link below but if you can you'll see they're clearly over the line when that happens:
Hell even if you can't, you can see in the screenshot his foot is only just on the other side of the line, and he's laying on his back fully stretched out, which puts a good 2 metres between where his ball is and the line.
I still wouldn't say that was a try even looking at those two links, it doesn't even look grounded to me. Either way, the welsh defense to stop him from scoring was sensational, Leigh Halfpenny knocked himself out making that tackle.