It took 5 fully-grown police officers to wrestle "Dharma & Greg" star Thomas Gibson to the ground during his DUI bust in L.A. this weekend ... and TMZ has the crazy arrest video.
We broke the story ... cops believe an intoxicated Gibson tried to drive his Audi SUV through a part of downtown L.A. that had been sectioned off for a nighttime half-marathon around 1 AM on Sunday morning.
The footage begins with Gibson standing next to his car speaking with police ... when a bike cop arrives to the scene and screams for the actor to, "Get on the ground, NOW!"
At that point, all of the officers on scene rush toward Gibson and manhandle him to the ground as he yells, "Why?! Why!?"
While Gibson is on the ground, he can be heard telling the cops, "I am NOT resisting ... I am NOT resisting!"
After Gibson is successfully placed in cuffs, the cops help him up and escort him away from his vehicle.
Gibson was eventually taken to a nearby station where he was booked for DUI -- and was released later that day on $15,000 bail.