Tragic actor Paul Walker's pal Tyrese Gibson broke down at the site of his Fast & Furious castmate's death on Sunday (01Dec13) and left the curbside memorial with a special keepsake. Gibson arrived at Kelly Johnson Parkway in Valencia, California, where Walker perished in a car crash on Saturday (30Nov13) with a flower he added to the gifts laid by fans of the late actor. He later posted a photo of himself holding a piece of the wreckage from Walker's car on his Instagram account. The 40-year-old actor was a passenger in a Porsche Carrera GT, which burst into flames after colliding with a lamppost and tree. Shortly after learning of his friend's death, Gibson posted a photo of himself with Walker online and took to Twitter.com to share his grief with fans, writing, "My heart is hurting so bad no one can make me believe this is real Father God I pray that you send clarity over this cause I just don't understand My heart hurts it's broken no one can convince me that this is real.... Prayer warriors please pray real hard for his only child, his daughter and family."