Usage of "think" instead of "thing"

[Raldo]

Quest: And We Shall Call It Eureka

Toward the end of the quest, you speak with Ejika Tsunjika who at one point says the following:
Of course I do! If you think I'm about to let a by-the-book traditionalist like you conduct an independent investigation, you've got another think coming!

I believe the word "think" there, should instead be "thing"...? Maybe not, now that I'm being corrected down below. Never heard that usage.

[Valarian]

It could be deliberate, owing to the player character presumably 'thinking' one thing, and about to 'think' something else, once they're better informed.

[Ferth]

That is actually the correct word in that particular colloquialism.

http://grammarist.com/usage/another-think-coming/

[Avenger]

That is actually the correct word in that particular colloquialism.

http://grammarist.com/usage/another-think-coming/



The FATE system is not living up to it's potential.

(emphasis mine)

http://grammarist.com/spelling/its-its/

Though perhaps I missed intentional irony in a grammar/usage post!

[Ferth]

(emphasis mine)

http://grammarist.com/spelling/its-its/

Thanks. That's been my signature for years. You're the first one to comment on it.

[Raldo]

Interesting, I've never heard it that way before.

[Hasrat]

"If you think [x]..... you've got another think coming."

Kinda a logical conclusion there.