"Furious 7" was the franchise's "most challenging" film to make and promote because the cast is "still mourning" their late colleague Paul Walker, Tyrese Gibson told HuffPost Live on Wednesday.
"Everything stopped. Everything shut down. Our first instinct was to quit and just let it go," Gibson said of the reaction to Walker's death in a car crash in November 2013.
22:40 Y&R Alum Passes Away At 5214