CO-STAR, TYRESE BREAKS DOWN AT PAUL WALKER'S CRASH SITE + HOW PAUL ENDED UP IN THE FATAL RIDE

Paul Walker's Fast & Furious co-star, Tyrese Gibson was overcome with grief Sunday afternoon when he showed up to the crash site where Paul died less than 24 hours before, to pay tribute to the late star. It's the same place fans are leaving  leaving flowers and various tokens in honor of Walker. Tyrese could be seen visibly shedding tears while everyone around him watched in silence while he mourns. He also took a piece of the crash wreckage home with him and posted a pic of it online afterward, with a very touching message (see it after the cut).

Meanwhile, according to TMZ;

"Paul Walker would have missed the car that took him to his death if it hadn't been acting up moments before the crash. Paul showed up Saturday for a fundraiser at Always Evolving -- Roger Rodas' high end auto shop that specializes in exotic cars. Paul had a stake in the shop. Sources connected to Roger tell TMZ when Paul arrived ... Roger was watching one of his employees try in vain to back the Carrera GT into the shop, but it kept stalling. Roger decided to take matters into his own hands ... told the worker to get out and took the wheel himself. As Roger began to back into the garage ... Paul came up and said he hadn't driven in the Porsche yet -- so he jumped in the passenger seat and they took a 20 minute drive. The fatal accident happened on the way back from that drive -- just 500 yards from the shop. 

Paul's best friend from childhood, Nute, grabbed a fire extinguisher and was among the first to arrive on scene. We're told Nute frantically tried to extinguish the flames ... even though it appeared to him both men were already dead."