Well, I'd be tempted to say 'I'll let you know when I get it...!'
I think all writers suffer from times when they can’t write. I know I have, although I don’t know I’d describe it as ‘writer’s block’. That sounds way to dramatic! For myself, when I experience a period of not being able to write, what I often do, if the ‘block’ lasts long enough, is walk away and do something else. Play with the kids. Mow the lawn. Experiment in the kitchen. I’ll often go for a run. I find that a great way to unwind, and something will often get shaken loose. The only problem then is running back to the house fast enough and before whatever’s occurred to me gets forgotten! Does wonders for my distance times, though…!