He had not seen The Passion, and realized after nailing one hand to the cross that he could nail the other hand to the cross...
From Man treated after attempting to nail himself to cross:
"Lt. Pierre Boucher said the man took two pieces of wood, nailed them together in the form of a cross and placed them on the floor. He attached a suicide sign to the wood and then proceeded to nail one of his hands to the makeshift cross using a 14-penny nail and a hammer.
'When he realized that he was unable to nail his other hand to the board, he called 911,' Boucher said.
It was unclear whether the man was seeking assistance for his injury or help in nailing down his other hand.
Hartland Fire Department members responded, said Boucher, and cut off the wood while it was still attached to the man's hand. The wood and the victim were taken to Sebasticook Valley Hospital, where the nail was removed."