Yes ;)
Legit, I have sat and stared at a screen for hours trying to jump start my brain into generating useful word combinations and gotten 0.
Two nights ago, during what is usually my prime creative zone, I had to give up after a half hour because it just wasn't going to happen.
I have to laugh or I'd be even more bald from pulling out my hair. When it's on, when the juices are flowing, I can type until my fingers can't move, lose hours of time without awareness of anything else, and almost cry because my hands can't keep up with my brain any more. So it makes the dry spells so much worse.
The ahahaha part is maniacal sympathy, laughing at the shadows of the mind that just don't cooperate.