In the part when Bobby is talking to Vicky (she is wearing a rainbow striped shirt) at the park, you could see her red car parked near the curb. When the shot switches to Bobby you see a red van go by past Vicky's car. Then the shot switches to her and then back to Bobby and you can plainly see the exact same red van pass by Vicky's car for the second time. It is not hard to miss.