Former SNL cast member, 30 Rock star and one of my personal favorite comedians is in critical condition following a serious accident this past weekend. Tracy Morgan was riding in a Mercedes Sprinter converted into a limo as it traveled down the New Jersey Turnpike in Mercer County, NJ when it was struck by a Walmart semi truck->ke1311.

According to the report, Morgan's Mercedes->ke187 was stuck in slow-moving traffic when the semi didn't see the slower traffic and failed to avoid the limo. The semi struck the rear of the limo, spinning it around and flipping it on its side, critically injuring Morgan, harming three other passengers and killing Morgan's long-time friend James "Jimmy Mack" McNair.

Morgan is currently in critical condition in the hospital, but is showing signs of improvement as of Monday afternoon. The complete rundown on Tracy's condition is unknown at this point, but there are plenty of rumors running around.

The driver of the Walmart truck, Kevin Roper, was charged with one count of death by auto and four counts of assault by auto. Reports claim that he had been awake for 24 straight hours when the crash occurred.

We'll stay on top of this news and update you as more information comes out.

Click past the jump to see some of Tracy Morgan's stand-up.

Warning, some language may be offensive to some folks.