Bowling Ball

From doing a lot of research i have found that the bowling ball drop is rather similar to the tennis ball drop - obviously there isn't the flexibility to squash and  stretch a bowling ball as there is with a tennis ball. But there is a high recoil from the first time it hits the floor like a tennis ball, and then each high of the recoil decreases alot which is unlike the tennis ball. I think this is due to the un-flexible nature of a bowling ball, its first landing hits the group with a such force that it has no where to go apart from back into the air - and then due to the weight of the bowling ball, each bounce afterwards is considerable less high as the upthrust and gravity ratio equalize. I am not a scientist so i could be completely wrong.... Anyhow - just to be extra sure of the key framing i have imported some reference footage into Adobe Premier Pro - i added the timecode effect with means i can see the film from frame to frame. I then added titles on the film so i can easily locate where the key frames are!...

Here is a link to my final reference footage:

Bowling Ball reference footage

I have to admit that i only found out how to download youtube files as video files after i actually made the bowling ball bounce. This is my bowling ball drop at the moment- This is fully exported and

Bowling Ball - Fully exported

This is only one of the view ports for the Bowling ball - i think i would like to add some more key frames to the bounce - maybe i will add a bit of a role at the end -  but i think it needs a bit of travel to make it look good, how ever i am fully aware not to make it role too much as it could make it look like the ball is on a slanted hill.