BGE parent glitch?

i have two objects (obj1 = riged body, obj2 = no colission)
obj2 is parented to obj1 but obj2 shows weird movement:eek:
My question is how to fix this and why is this happening

video of the situation

Do you specifically need rigid body? could you use dynamic?
Otherwise i would try applying the scale.

Yeah you need to do object>apply>scale

Thanks thatimster and kendrick1397
it works now after applying the scale
and yes I need riged body for that object