Spiral Bounce

I made the spiral by creating a straight vertical path with a circle curve at the base. I then selected them both and extruded the circle the create a cylinder, then rotated it 3600 degrees and scaled the circle down to make the spiral. For the animation test I used the same method as the ball; key framing then scaling to add squash and stretch, then adjusting the timing using the graph editor. But despite my adjustments, I still think it looks rather weightless... I think it needs to fall quicker. I'll try to amend this later.