Sounds like something electronic as it was a severe bump it may have set something off as it simulates an impact, the first would be the inertia switch for the Fuel Pump but then the car would run have stopped altogether by now.

You could try resetting the ECU, you can do this by either disconnecting the battery for a while or by pulling a 1A fuse in the the engine fuse box this protects the KAM (Keep alive memory)

Martin