Informal sentences and expressions...

[Freddyben]

sure thing !

[Thomas]

Yes, "blushing" is what you should have said You guys made me laugh about the flushing.... And you say a "spelling mistake" -- we have the words orthograph and orthography, but nobody would know what you meant We just say "spelling" instead. But as for the word order, it will usually be the one without the "of" -- for example, a grammar mistake, not a mistake of grammar.

To answer the question about straightforward, you guys are right. I would say that it also has the meaning of "does not require any explanation." And that's a pretty common thing to say, I use it a lot Especially with that "well" there, it sounds very natural!