Steve-O Fantastic Fest Jackass 3-DAdd lighting his head on fire to the list of self-mutilating stunts Steve-O has pulled.

Seemingly sober -- thanks to "Jackass" cohort Johnny Knoxville's recent intervention -- Steve-O soaked his head in hairspray and then lit it up. Once he did, an accomplice with a mouth full of a flammable substance (probably liquor) used the daredevil's flaming hair to trigger a bit of fire-breathing.

The stunt went down at Fantastic Fest and served to promote the upcoming "Jackass 3-D" movie.

Read on to see Steve-O's noggin used as a wick and to hear his very special and NSFW message for James Cameron.