Karen Snyder used to laugh at her hyperekplexia. Like the obscure breed of "fainting goats" that fall down at any small startle, Snyder will crash to the floor with completely stiff limbs at a knock at the door or a tap on her shoulder.
Seconds later, Snyder's stiff body will relax and she can assess whatever damage has been done.
"I've knocked over displays in stores before. You can't control where you're going to get startled," said Snyder, 34, of Chico, Ariz. "Making cupcakes, I went down...Full Story