Continuity mistake: When Jackie Boy is picking up his gun after having his hand cut off, all the carnage and blood that occurred behind him (Miho slicing up his buddies) almost entirely disappears. The only sign of it happening is the body of the decapitated man in one shot. Then everything seems to disappear for several minutes.
Suggested correction: The car is definitely visible in a couple of shots, and remember three of the guys did not make it out of the car before they were killed.