Continuity mistake: When Charlie hears DriveShaft on the radio, his brother has his hand on the wing mirror in one shot but on Charlie in the next and vice versa. (00:05:10)
Continuity mistake: Charlie's list that we see several times in the episode is constantly changing in regards to the writing on the paper. Most noticeable is the word Time and I Heard. (00:11:20)
Continuity mistake: Alex gets handed her gun while she has bloody hands. She then proceeds to run to her boyfriend in the woods. When she arrived, her hands are clean. (00:19:00)
Answer: Using a mold, a realistic pregnancy belly is made of latex (rubber), including the distinct belly button, to suit the proportions of Emilie de Ravin who plays Claire. It is then painted with a special paint/adhesive compound that adheres to the surface and for shots of the actual belly, additional veining and stretch marks are airbrushed on.
Super Grover ★