Heaven is in Your Genes - S3-E6
Revealing mistake: While Ralph is in mid-air, en route to the airport cafe, something dips into view at the top left corner of the screen. Then when Ralph takes off from that cafe, two shots later as he's in mid-air, we can see the shadow of the helicopter filming the background stock footage, but it's been flipped so the helicopter is flying backwards, and when more background footage is shown again the helicopter shadow is flying properly. (00:13:15)
