Foreign mistakes using English expressions

[JPablo]

I will like to start a thread here with common (or not so common) errors you have seen or heard. (Normally with people more or less acquainted with English... Spanish or any other language.)

I heard, for example, things like, "I am going to roll my arms and get to work", instead of "roll up my sleeves".
Or "Do not believe what these politicians say... it is just cake in the air", instead of "pie in the sky".

On the one, “It pounded the nail in the wood.” I guess it may have to do with "hit the nail on the head"? (You can give me your take on this one, as I am not totally sure what it actually means or has to do with my guess, or otherwise...)

At any rate, while these may be funny and almost fall in the category of 'puns', I'd like to read some of these mis-steaks... Because, even if one doesn't always learn from these mis-steaks, one always can have some fun...