This past weekend, my '07 GS450h with 16k miles lost power at expressway speed. "Check hybrid system" "Check ECB" and "Check VSC" all flashed in the monitor in between the speedo and the KWh power gauge. I pulled over and noticed that the hybrid battery had also drained to the minimum level (purple bars). Had Lexus roadside assistance tow the car to the nearest Lexus dealer. Before the tow truck arrived I decided to hit the start button again to see what happened, and to my surprise, everything seemed fine - no warning messages and car accelerated just fine. I drove it for a few miles but had it towed to the dealer anyway. A little concerned as the car has been unbelievable thus far, no complaints. Hoping this is a complete fluke and not a !Removed! in the whole hybrid technology. Anyone have a similar problem or ahve heard of this?