I just found this link:


http://www.consumeraffairs.com/news0...s_stalls2.html


This quote from the artical made me wonder :
"NHTSA has received 33 reports of the gas-electric hybrid shutting down without warning, typically at speeds between 35 miles per hour and 65 miles per hour."

Do you think you could be on the highway at 65mph, switch to electric power, and have no indication via the dash display that this is happening? Other reports in this thread seem to indicate that a warning light would go on.