When Dr. Kelso and Ted are on the roof scaring away the crows, Ted makes reference to someone throwing bird seeds onto Kelso's car and then proceeds to do just that while Kelso is distracted by The Janitor and Randall. Later on, when Ted is contemplating jumping the camera makes a sweep, and we realize that the section of roof is nowhere near the parking lot. This is confirmed when Ted lands on lower rooftop where the trash bags were hidden.
The view of Ted falling shows that there are no garbage bags on the ground below him. But a few seconds later, he falls into the huge pile of them.
When Michael J. Fox (aka Dr. Kevin Casey) walks in, a wedding ring can be seen on his left hand. However, later on, Jordan, Dr. Cox, Carla, and Dr. Casey are all sitting in the cafeteria. Jordan asks if he's single and he replies, "Yeah, are you?" And there is no wedding ring.