Here's how the Insight hybrid technology works:
Let's say you have a wagon pulled by a horse (ICE).
The horse can pull it from a dead stop of course, but he's really only comfortable plodding along at speed, that's where he is at his best.
So you hook up a pony with him (IMA) and the pony helps get the wagon rolling from a dead stop, pulling as hard as he can to get the wagon up to speed. The pony tires out quick, but he helps keep the horse fresh for the long haul.
When the wagon is cruising at speed, the pony jumps up in the wagon with you and the horse happily pulls you down the path.
When the wagon slows down, the pony jumps back out to eat, and the horse and pony both get some rest when you stop.
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