I was traveling down a mountain while on vacation last week and something strange happened. After more or less regenerating downhill for about a mile while watching the battery indicator charge up I decided to shift to "B" mode to let the engine take some of the braking. After another mile or so I shifted back into Drive and started regenerating again and finally the battery bars peaked out. I realized the battery was at least 80% (100% full indicator) when the road leveled out and started to drive UPHILL towards a stoplight for about another mile. The strange thing that happened was when I accelerated (not coasting) uphill it was on battery power ONLY all the way to 30 mph before I had to stop at the light. I had expected it to turn on the ice accelerating above 25 mph but it just kept on going like it was in EV mode. I'm curious as to how fast and far it would have gone electrically (in Drive) had I not stopped at the light. I wonder if the ECM decided it would over ride the limit and not turn on the ICE until the battery charge was reduced to a more normal depleted state. Of course after the stop and go at the light it turned on the ICE at 25 mph. It sure was nice to get a small taste of EV mode accelerating above 25 mph for a change even though it may not have been good for the HV battery.