Chapelle's Show - Moving Blood
Put on Episode 5 of Chappelle's Show Season 1, and skip to about the last 5 minutes where Chappelle is being interviewed for his roles in movies.
When it shows the clip from the fictional movie "Little foot, Long foot", and he gets up from smashing his head on the counter of the fast food shop, notice the blood on his forehead.
First, as he gets up and orders a burger and cool drink, there's a small amount of blood... then as everyone's clapping and he says "and a cherry pie!", the blood reaches his nose (and the camera goes up really close to his face so it might be done intentionally for you to notice)
THEN (now watch carefully), as he says "AND A MILKSHAKE!" and starts clapping himself, the blood has disappeared from his nose, and is only above his eyes, when it was clearly on his nose in the previous shot.
Season 1 of Chappelle's Show