30th Mar 2005
Do-It-Yourself Mr. Bean - S1-E13
Revealing mistake: After Mr. Bean crashes into the van with the feathers in it, and then goes inside, he coughs, and feathers supposedly come out of his mouth. However, from the way he does it, you can see the feathers were in his hand to start with.
25th Mar 2005
Revealing mistake: After King Arthur cuts off both the Black Knight's arms and both his legs, as Arthur rides away and the Knight is struggling on the ground, as he turns sideways you can see both his hands, held behind his back, and the depression in the ground where he is standing in a hole. This is how the effect was achieved.