is it common for these skis to tilt suddenly to one side when idling and make a turn.This is only the second time I took out these skis since I got them and both times someone or should I say both riders fell of when ski suddenly tipped.I tried duplicating it and it did it to me also but I was fast enough to throw my body weight back the other way and I did not slide of the seat.It seems to happen just on idle and if you try to make a turn..anybody else experience this?