(CNN) -- A Portugal player embarrassed himself Monday with his crazy decision to use his head the wrong way and he got panned for the way he lashed out at an opponent. 

That, and Portugal's play in a humbling 4-0 loss, were two of the lowlights on the fifth day of play in Brazil. As was a 0-0 draw that produced very little excitement. 

But then there was the stunning goal by a U.S. player whose inclusion in the game was a surprise to many. 

Here are a few of the day's big developments. 

That's not nice 

Pepe, Pepe, Pepe. Bad boy! 

It is generally frowned upon to headbutt anyone, anytime -- unless it's Wrestlemania! 

But if you're gonna do it -- and again, shame on you for thinking about it -- at least do it right. 

That's not us, that Twitterazzi, who slammed the Portuguese player after he tapped German forward Thomas Muller in Monday's match with the crown of his head. 

"The only man that can pull of a headbutt with class is Zinedine Zidane," wrote @YusufBambi, referring to the memorable 2006 World Cup incident in which the French great slammed his head into the chest of an Italian player. 

"I'll rate that headbutt 1 #Zidane out of 5 #NeverGoFullPepe #WorldCup2014," said @MrNewports. 

"Calling that a head-butt by Pepe is an insult to Zizou..... and (boxer Evander) Holyfield," wrote â€ 


Who got panned?
What did he do to another player?
What part of his body did he use to hit?
Who did he hit?
What position does Muller play?
What country does he play for?
Is another head-butting player discussed?
What is his name?
When did he do it?
To who?
Where did he hit the man?
Do people seem to think Pepe didn't even do a proper head-butt?
Do they think Zidane did?
Who scored an amazing goal?
True or False: Portugal lost a game 4-0.
What score was the other low point that day?
What day did these games take place on?
Where did they happen?
What day of the week was it?
True or False: The 0-0 draw was fairly boring.
A Portugal player
A Portugal player 
lashed out
lashed out
his head
his head
Thomas Muller
Thomas Muller
forward
 forward
Germany
German
yes
 Zinedine Zidane
Zinedine Zidane
Zinedine Zidane
2006
2006 
an Italian player.
an Italian player.
chest
chest
yes
But if you're gonna do it -- and again, shame on you for thinking about it -- at least do it right.
yes
The only man that can pull of a headbutt with class is Zinedine Zidane
a U.S. player
a U.S. player
True
Portugal's play in a humbling
0-0
 0-0 
fifth
fifth
Brazil
Brazil
Monday
Monday 
True
 that produced very little excitement. 