Ryan Dunn, 32-years-old, has been killed in a car accident. It is known that he was drinking a few hours before the accident, evidenced by a photo he tweeted of himself hanging out with friends and drinking beer at a bar.  

He was driving a 2007 Porsche 911 GT3. Another male passenger was in the car and died as well in the crash.

Film critic Roger Ebert's twitter comments following Dunn's death has triggered an online spat over whether they were too soon or too offensive.

Ebert tweeted: Friends don't let Jackasses drink and drive.

Dunn's friend Margera took to Twitter to express his anger toward Ebert's tweet.  He tweeted: F*** you! Millions of people are crying right now, shut your fat f****** mouth!

The death of Ryan Dunn, likely due to speeding and drunk driving, has also triggered the renewed awareness of the danger of drunk driving.

According to the National Highway Traffic Safety Administration (NHTSA), 33,808 people died in car crashes in 2009 in the United States (latest figures available), including an estimated 10,839 people who died in alcohol-impaired driving crashes, which amounts to for nearly one-third (32 percent) of all traffic fatalities for that year.

However, in 1982 (when NHTSA started collecting such statistics), there were 21,113 drunk driving-related deaths, which means the number of drunk driving deaths has been cut in half in less than three decades.

Speeding is another leading cause of fatal car accidents.

A US Census report in 2008 showed that 77 percent of interstate highway fatal crashes happened to vehicles traveling over 55 mph. Dunn may have been speeding as fast as 110 mph, according to TMZ.