Very cooly taken penalty too.
I think it's only natural that when you dominate a first half that much that you take your foot off the gas in the second. Not sure if I have ever seen such a one sided half of football.
To me (even though he doesn't play that much) he seems to be the player of the season so far. Lukaku is great and deserves all his praises, but Martial is the unsung hero for me.. He's got so much potential. Hopefully he has a personality to go along with his talent, so that he can realize the huge potential he has.