I was thinking of some shots you could take if you went bowling that I wanted to share.
Instead of trying to freeze the motion of bowling, perhaps taking a side photo during the bowler's last step while their arm moves through to release the ball would create some cool blurred motion. I would focus the bowler's face. Or a close up of the ball with the bowler's face in the background (blurred or in focus) would be cool. A photo of all the bowler's shoes would be a fun shot too. Now watch, you will go play golf instead!
Good luck! I look forward to seeing the pics!