The utterly stupid thing is, leaning as far down as possible he couldn't actually "head butt" him in the proper sense, if he dragged him to his feet and broke his nose with a proper head butt, but that is literally the most pathetic head butt I've seen.
What I hate is his hypocrisy, he will dive and make a meal of contact all game long yet react like someone tried to murder his children if anyone else does the same. Fully deserved red, frankly Portugal are mad to have him in the squad, one of the least trusty worthy players in world football today.
Muller's second goal was fantastic though, the cross isn't great, Muller has absolutely no right to get the ball or block the clearance. Many players would give that up but he not only did he win the ball his reaction, the instant shot not giving the keeper time to react.
Muller is one of the most disgustingly effective players in world football, he's not the fastest player, he's not the most agile, he just is in the right place making the right choice 99% of the time. Epic player.