In Need Of A Caption

The Creative Cloud twitterers are looking for a caption for this photo:

Here are my entries so far:

1. Proof positive that graffiti is rubbish
2. Why Michelangelo didn't work in graffiti
3. "And then the voices in my head just stopped"
4. "You were right. It took 4 coats to cover it. I owe you a Coke."

And your caption is ...