During the fight with Shepherd and Sloane, a shoe flies off. Shortly thereafter, the shoe is back on the foot.
When Addison is in the OR with Shepperd and tells Karev to page the pediatrician, she says "Page Dr. Freedman". Dr. Freedman is the Private Practice (2007) pediatrician, Addison's fellow colleague at the Ocean Side Wellness group. The pediatrician that is supposedly paged is Dr. Robbins.