First time co-starring for River Phoenix and Keanu Reeves who forged a strong friendship the previous year when Reeves was making Parenthood (1989) in which he played alongside Phoenix's off-screen girlfriend Martha Plimpton and his younger brother Joaquin Phoenix. Reeves and Phoenix would begin talks with Gus Van Sant during filming and subsequently star together again in My Own Private Idaho (1991) the following year.
Joey and Rosalie are in the car, with mama Nadja outside trying to persuade Rosalie to get out of the car because it is about to blow up. As Rosalie understands and tries to shield her head there is a piece of cake/bread in her right hand. However, as the shot returns to her, it is in her mouth.
In the opening title sequence, a close up of Kline preparing pizza shows a wedding ring on his left hand. But when he is seen, in a tight shot of his hands, slicing mushrooms like a pro (i.e. his mushroom slicing double), there is no ring.