Extreme wobble/jitter on taxing?

[Limaro]

Hi,

since long time I came back a little to this nice SU-25T. I was doing the startup training. And immediately on my first rolling I got a very unpleasant wobbeling. I guess it's meant to simulate the ground affecting the aircraft. However, it's really extreme. It feals like a very hard jitter, giving me a fast headake.

I have no real "experiance" with real jets of course. The only thing mabe going into this direction was a flight with a very small helicopter. It shook and trembled violently. But only the whole aircraft - with me a little bit - NOT the world arround me looking outside. Maybe the effect of the SU-25T could be reduced to the aircraft if really needed, but not on the outside.

Regards