"The moose would start to move, and then the helicopter would back off and try to keep the moose out in the open," Larsen said.

But instead of moving toward open space, the moose charged the helicopter.

"As the animal got closer and closer to going down, an animal sort of loses its thinking -- its ability to rationalize what's in its best interest," Larsen said.

Copyright 2007 The Associated Press. All rights reserved.This material may not be published, broadcast, rewritten, or redistributed.