Actor Alan Ruck was at the wheel of on Tuesday night when it accelerated through a red light, hit two cars and smashed into the side of a Hollywood pizza restaurant. he “didn’t know what happened” to the truck to cause it to lurch forward and run the red light.

The 67-year-old was driving truck at around 9 PM on October 31 when he came to a stop at the intersection of La Brea Avenue and Hollywood Boulevard, . While waiting at the red light, the R1T suddenly accelerated, hitting the rear of a car waiting in front of it and careering into the side of another. It then smashed into the side of Raffallo’s Pizza shop.

Footage from the incident shows Ruck’s car suddenly lurching forward. It also talking to investigators on the scene after the crash. KTLA5 reports:

“The whole building shook and I thought a bomb or something had exploded,” Tim Ratcliff, who owns several restaurants next to Raffallo’s, told KTLA’s Chris Wolfe.

Ratcliff says he rushed to help Ruck who appeared more concerned about the wellbeing of others than his own.

“I asked him, ‘Are you okay?’ And the first thing out of his mouth was, ‘Is everyone [else] okay? I think I hit someone. Is he okay?’”

When it comes to the cause of the crash, law enforcement are seemingly as clueless as Ruck claims to be. The LAPD is investigating the collision but do not believe drugs or alcohol were a factor, .

Despite careering into two cars and a building seemingly without control, Ruck was reportedly uninjured in the crash, according to CBS News. However, one person did end up in hospital with injuries that says “are not considered to be serious.”

Raffallo’s Pizza, meanwhile, has been “yellow tagged” by law enforcement, meaning it cannot reopen for business at this time.