When CG puts ketchup on the fries in the close up they are of the shoestring variety. In all other shots of the French fries they are of the steak fries variety.
In the corridor fight sequence when Kai pins one of his assailants against the wall with their butterfly knife, the knife shown as the assailants hand hits the wall is a very poorly composited visual effect which looks nothing like the real knife visible in the shot immediately after.