Neat little game, similar to line rider if anyone's played it. except in this case it's a ball. Updates come out almost daily for it. it's still in early stages of development though, but it can still be a fun little time waster while you've got some time to spare.
https://market.android.com/details?id=com.schr.line.roller&feature=search_result
https://market.android.com/details?id=com.schr.line.roller&feature=search_result