Wingsweep and grease weirdness

Dunno why this would trigger grease. You focus intensely, and with a great exertion of strength and will create a mighty gust o f wind with your wings. Your wingsweep maims someone! Someone is blinded by some flying dirt and debris! Your wingsweep mauls a wicked anti-paladin. A wicked anti-paladin is blinded by some flying dirt and debris! Despite the grease on you, you manage to hold onto a silver chain flail.