He nods, as if agreeing, while he thinks it over. It's still ridiculous. But the spirits, who guard Robin so closely - would they put her to sleep? Why else hasn't she said anything?

"How fast can you fly?" he asks after a moment. Even if Crowley doesn't succeed in understanding what's happening, they could organize a distraction. Pull some of the spirits away from the town to chase him, then those in town can try to clean up the ones who stay.