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Kevin Hart returned to work after his near fatal car crash in Calabasas, Calif. last month. Hart, 40, sustained three back fractures and underwent surgery to fuse his spine.

After spending a week in a rehab facility, Hart went home to continue his physical therapy last month. Now he has returned to work.

Hart met with his Jumanji co-stars, including Dwayne "The Rock" Johnson, Jack Black and Nick Jonas, to shoot a promo for the Jumanji sequel.

The three actors revised their busy schedules to shoot the promo with Hart.

But a source tells Us Weekly that the comedian has not fully recovered from his serious injuries.

"Kevin has a long way to go in his recovery," a source tells Us Weekly. "He had to be a part of the promotional shoot for Jumanji and he wasn't going to miss it. He was cleared to work for short periods of time. He has been at the studio for a few hours a day doing very small things. He will be working again this week and getting done what he needs to do."

Hart was seriously injured on September 1 after his 1970 Plymouth Barracuda veered off Mulholland Highway and landed on its roof in a ditch.

The Barracuda was driven by Hart's friend Jared Black who also suffered back injuries. Black's fiancee, personal trainer Rebecca Broxterman, managed to escape without serious injuries.

Black and Broxterman are suing Hart and an auto body shop for failure to equip the vintage sports car with safety devices such as airbags and seat belts.

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Kevin Hart was discharged from a hospital and transferred to a residential rehabilitation facility 10 days after he underwent emergency back surgery.

Sources tell PEOPLE Hart was "in good spirits" after undergoing surgery to fuse his spine that was fractured in three places during a serious car crash on Sept. 1.

The 40-year-old Jumanji star was transferred to a rehab facility for intensive physical therapy to help him walk again.

He was spotted leaving L.A.'s Northridge Hospital Medical Center in a wheelchair before being loaded into a van for the trip to the rehab facility.

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"I'm grateful to be alive," he reportedly told an unidentified source who spoke to TMZ.

The comedian was a passenger in his vintage 1970 Plymouth Barracuda when the driver lost control and the vehicle careened down an embankment on the night of Sept. 1.

Hart underwent emergency surgery on Sept. 2. He was said to be in extreme pain and on potent intravenous painkillers.

He is expected to spend up to 4 months in rehab before heading home to continue his physical therapy.

Hart reportedly pressured his team to downplay the seriousness of his back injury because he has movies and TV projects in production.

In a 911 audio obtained by TMZ, a woman believed to be Hart's wife Eniko, 35, told a dispatcher he couldn't walk and he was "not coherent" approximately an hour after the crash.

TMZ reports Hart’s car will be disassembled by the California Highway Patrol to assist in their investigation of the crash.

The results of their investigation may help change vehicle safety laws and require dealerships to install safety harnesses and airbags when selling vintage cars.

Gossip tabloids National Enquirer and Radar Online paid top dollar for photos of an unresponsive Lamar Odom at Nevadas's Love Ranch.

Apparently the brothel's prostitutes were more concerned with taking photos of Odom than calling 911 and getting help for him. There are also reports that a mystery man cleaned out Odom's room before help arrived.

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