In the new episode where the Simpsons go to Blockoland and Homer decides to be a good simaritan kinda guy. When the hair salon, Hairy Shearers or something, won't take Marge's coupon for free hair streaks, Homer goes in to persuade them to do so. He grabs a hair net off the counter and drops it on the ground, but in the next shot the hair net is still there. Then in the next shot, it's gone again!