I have a 1988 Kawasaki 650SX and why does it porpose at 30mph is it prop or drive shafts?

I did run over a cable and got it stuck in prop. It only does it at 30mph and above? or:I did run over a cable and got it stuck in prop. It only does

I did run over a cable and got it stuck in prop. It only does it at 30mph and above?

or:I did run over a cable and got it stuck in prop. It only does it at 30mph and above?

Tags:over,prop,