Countdown from 500
When I was on vacation this last weekend, I took a midday nap. While in a state half-awake and half-asleep, I dreamed that I wasn't allowed to wake-up until I had counted down from 500. Though I tried, I could never get very far, as the numbers started to overlap each other and I continuously lost my place. And because I couldn't count-down, I didn't fully wake up for a long time.
It was frustrating, to say the least. And so was this drawing.