Anthony Martin, a Wisc. escape artist, freed himself from
shackles while skydiving in a coffin Tuesday, a stunt he
performed for the first time 25 years ago.   SERENA, Illinois
(AP) — A Wisconsin daredevil parachuted gently into field
Tuesday after managing to free himself from shackles and a
locked coffin while plummeting through the air.  Anthony Martin
waved to the cameras and the crowd that turned out to watch his
stunt after he landed in Serena, Illinois, about 70 miles (112
kilometers) southwest of Chicago.  After being dragged from a
plane at about 14,500 feet (4,400 meters) up, the coffin whipped
wildly from side-to-side with Martin inside. One of the two
skydivers who were steadying the box was hit in the face, but
everyone landed safely.   Martin, who is from Wisconsin, began
studying the art of escape at age 6 after his father shattered
his early fascination with magic by explaining the trickery
behind a floating pen illusion.         The box was dragged from
the plane and two skydivers helped stab