Get this every now and then, usually when nailing it in 1st and 2nd. Did it when I had a stock tune, still does it with Stage 1. it is hard to replicate as it happens so rarely and on all different roads and conditions. There is plenty of fuel in it when it does it. i guess it could be ESP but one would think it wouldn't be so rare an occurrence if that was the case? Same goes for ignition and fuelling as surely it would be more common if I had issues with those systems. Car is 2.0T FSI, DSG.