Ryan Dunn's passenger ID'd as Zachary Hartwell

ryan-dunn-twitpic.jpg"Jackass" daredevil Ryan Dunn wasn't alone when he crashed his Porsche early Monday (June 20) morning. Authorities now say 30-year-old Zachary Hartwell (above right) was also killed in the accident, reports TMZ.com.

Dunn, according to police, was driving in excess of 100 mph when he lost control of his Porsche and it flew off a rural Pennsylvania road, crashed into a tree and exploded in a ball of fire.

Hartwell, a production assistant on "Jackass 2" who also had a part in Bam Margera's movie "Minghags," appeared in photos Dunn tweeted just hours before the crash. In the pictures, taken inside a Philadelphia area bar, the two appear to be drinking.

Photo/Video credit: Twitpic