How to play against g4 in the Sicilian?

This guy keeps playing this weird line against me. How should I respond? What are the ideas?

What about 8...Ne5 to attack the knight?

d5! every Dragon player should know that move. Instead of 9 e5 ne4, you'll probably get 9 exd5 nxd5 10 nxd5 Qxd5. BTW, you should have played Nc6 before O-O. If he then plays g4, you win.

I think I would like this as white!

I don't know the mainline but I would imagine Nc6 and normal development may be the correct way to play.

8.g4,Nc6 is the best move.

On that game 10.f4 best move of black is capture Nxc3. 11.bxc3,Nc6 12.Nxc6,bxc6 13.0-0

8.g4,Nc6 9.g5,Nh5 10.Bxh5,gxh5 11.Nd5,Bg4 12.f3,Be6 13.c3,Bxd5 14.exd5

Thank's for the comments guys!  After looking at it some more, I think Nc6 and d5 are great choices, and can sometimes be played on sequential moves. 

G4 and a4 are both quite modern and legit moves, the annoying idea can be stopped by a6, as the attackers a-pawn can not recapture due to the pin.