Judah Friedlander who plays Nicky played a small roll as the cashier at the Oyster Bay store in Meet the parents, one of the many movies spoofed in this film.
When Julia dances for the firemen, they hit her with the fire hose, knocking her back. In a few shots afterward, especially in the close-up of her swishing her hair back, her neck-fat prosthesis has come loose.