What can happen if an e-cigarette blows up while you’re using it

This is what can happen if an e-cigarette blows up while you’re using it--see article in LA TIMES

Karen Kaplan

It was an injury unlike any Dr. Elisha Brownson had seen — a young man whose teeth were blown out when his electronic cigarette exploded in his mouth. His injuries were so severe he was admitted to the trauma intensive care unit.
“I had never heard of an injury mechanism like this before,” said Brownson, a surgeon who specializes in treating people with burns. The patient “left a gruesome impression on me.”
Unfortunately, his wasn’t an isolated case. More victims of exploding vaping devices followed, until Brownson and her colleagues at the University of Washington Medicine Regional Burn Center in Seattle saw about two such patients each month.