Rhea'li isn't that far away from Crowley when he suddenly sits down, he himself also already in the dirt. While he's not opposed to rolling around in dirt when he needs to, it's certainly not usual for him to be flopped on his side as he is right now, acting much like a cat that has found a comfortable spot under a ray of sunlight.

As for why his behaviour is strange... well, there's a woofaloomp trying to catch the tip of his tail, which he always twitches it just out of the furry creature's reach every time it jumps for it. And... well, it turns out that when he usually has an immunity to mental influences, that just makes him rather susceptible to them when that immunity is suddenly gone without his knowledge.

"Magical emotional manipulation?" His speech is slightly slurred and his gaze a little unfocused, as though he's a little drunk. "Surely you cannot mean these fuzzy furballs...?"