Those one liners that cause you to *facepalm*.

[LDKS150]

This could be from games, movies or even in real life (you know, that thing in between movies and games?).
Mine would be from the first Predator movie were Arnie throws a knife into some guys gut and utters the line "Stick around"...*facepalm*
And another when I was in school and we were learning about the Victorians when a girl asked "Is that when they were dropping those bombs on London?"...*facepalm*

 

[justhereforthemoney]

A girl asked in class if the Titanic was real.

 

[Daystar Clarion]

"I'm not a racist but..."

Always makes me facepalm...epicly so.

 

[one of them]

Alex Mercer made me break the facepalm record.
I think the people who designed the Dialogue just used a template.
___________ IS THE KEY TO ALL OF THIS
___________ IS THE KEY
___________, HE'S GOT TO BE THE KEY TO EVERYTHING!

 

[Nincompoop]

A girl in my former class asked a stupid question in a math class;

Girl; "What was it again? Einstein? Frankenstein?"
Teacher; "Pythagoras..."
Girl; "Oh, yeah."

 

[Disaster Button]

A good guy beats up 400 guys without breaking a sweat, "I'm getting too old for this" *stabs more guys*

Spoiler: Facepalm

And this.

"I'm not a racist but..."

Always makes me facepalm...epicly so.

Unfortunaly for me my dad does it a lot.

 

[madcap2112]

A customer at the deli I work at: "Do those sandwiches come on bread?"

 

[Deleric]

Pickup line: I'm no Fred Flinstone, but baby, I'll make your bedrock.

...

 

[AWAR]

My classroom's level of vocabulary.. They dont even know how to speak in their own language!

 

[khaimera]

Anytime anyone says anything positive about Jersey Shore.

what about how fun it was to watch snooki get hit in the face. Get ready for your facepalm.

OT: when someone puts on their turn signal as they are halfway through a turn

EDIT: I reread the title and it asked for oneliners, whoops. So how about when someone says epic fail.

 

[ffs-dontcare]

Any one-liners from Batman & Robin.

Also, every line from the Maiden of Grief in WoW.

 

[Nebr66]

One time when I said "And I was all like, *****, make me a sandwich" right infront of a group of girls when i was out with some mates. Pretty much everyone within earshot facepalmed on that one.

 

[Infinatex]

These guys on the train, acting all hard and talking about their cars (I know, why were they on a train then!?) and the engine size.
"Cuz, I'd snap you, mine's a V6, so that 's like, what, 6000 cylinders...? yours is only four...."

...

 

[Irridium]

Alex Mercer made me break the facepalm record.
I think the people who designed the Dialogue just used a template.
___________ IS THE KEY TO ALL OF THIS
___________ IS THE KEY
___________, HE'S GOT TO BE THE KEY TO EVERYTHING!

I think the key thing to remember here is that the game was more focused on action then story

 

[DoctorWhat]

A girl asked in class if the Titanic was real.

Oh my word...
Epic facepalm...

Oh wait, discussion... Erm, I guess the time we were given a written spelling test in my English class. As in, it was written... i.e. "spell onomatapaeia" WTF... We all kinda think our teacher was high when she came up with it. Worst part is, some people got some WRONG!

 

[Meggiepants]

Mine would be from the first Predator movie were Arnie throws a knife into some guys gut and utters the line "Stick around"...*facepalm*

Practically all the one liners the Governator says are face palm moments. I believe it is in his contract somewhere.

"Here is Sub Zero... now plain Zero!"

Classic.

 

[Henry Michel Proust]

"When you have to shoot, shoot. Don't talk." Tuco in mindblowing scene from The Good, the Bad and the Ugly, when he shoots a stupid villain who had an oportunity to grasp his revenge but decided to talk instead of avenging. It's also a great deconstruction of one of the biggest cliches in cinema.

 

[Wolfram23]

Arnie one liners are awesome. Like when he throws a tube through a guy and impales him on a boiler, and steam shoots out and he says "Let of some steam!"

"Who is your daddy and what does he do?"
"AAARRAAAHAHRARAAHAHARRA" (getting electrocuted)
"I thought you said you'd kill me last!" "I LIED!" (drops guy off cliff)
"Cookies?"
"FREEZE!" (from batman... so bad)

Oh Arnie.

 

[towncalledmike]

A girl in my history class:

'How do you spell USSR?'