The Jackass star, Bam Mergera is mourning the death of his co-star and best friend, Ryan Dunn. Dunn and his companion, Zachary Hartwell died on Monday morning, June 20 in a violent car crash. The Porsche 911 GT3 Dunn was driving flipped over a guardrail, eventually crashed into a tree and burst into flames. It still has to be determined whether Dunn and his companion, Jackass crew, Hartwell die due to the crash or the fire that engulfed the vehicle. Several hours prior to the incident, Dunn tweeted a picture of him drinking with friends; a toxicology report will be released in a couple of day to see if alcohol played a part in the accident. Mergera was in Arizona when the accident took place made the trip to the site of the crash and burst into uncontrollable sobs for the death of his best friend and his own personal loss. He and Dunn practically grew up together in Pennsylvania; the Mergera family loved and treated Dunn as one of them. It’s pretty understandable why Mergera took great offense when Chicago Times critic Roger Ebert tweeted insensitively about the death of Dunn and lashed out on Ebert in a pair of angry tweets…Ebert apologized for tweeting too quickly.