All of the above. But I'm afraid I also use it much more widely than any of those alternatives). I also use it for "Better be cautious around that (or using that); it can go wrong suddenly in a way that you'd never expect."
It's not just the degree of danger or the likelihood, but the presence of ANY danger where you would never expect any.
no subject
It's not just the degree of danger or the likelihood, but the presence of ANY danger where you would never expect any.