Roseanne's right arm changes position while she's talking to Darlene after finding out the results of the pregnancy test. At first, her arm is bent, and she is clicking her nails; Darlene's hair is behind her shoulders. In the middle of the scene, it's in front of her shoulder on one side, and she is playing with her jacket; Roseanne's arm is now at her side. In the final shot, Roseanne is clicking her nails, and Darlene's hair is behind her shoulder.
D.J. is the timekeeper for Roseanne's test, and he frequently calls out the time remaining, with seconds. Problem is, the alarm clock he's using doesn't have a second hand, a fact confirmed during the closing credits with a close-up of the clock face.