I have the same problem also. Mainly does it when down-shifting to overtake and the rev's approach red-line. There's one helluva jolt, engine light comes on and the cruise control light flashes, also disabling the cruise control function.
I've been told it's caused from the ECU detecting 'over-boost'?!?! and the only remedy is to disconnect the battery or pull out the ECU for a few seconds.
It's ok around around town but on a country run it really sh!ts me as it only does it when cruising above 130km/h*. Surely there's a fix for this?

*speeds above the posted legal limit were undertaken on privately owned sealed roads under controlled environments.