The late Johnny Cash sang "I Walk The Line" — but you can bet he never rode it on a sled.
Already a hit with the Internet community (i.e. those same crazies who gave us that penguin-whacking Flash app), Line Rider iRide lets you draw simple — or increasingly complex — line paths on your iPhone, which the sled-riding Bosh bravely navigates until he experiences the old WIDE WORLD OF SPORTS "agony of defeat" (translation: he wipes out, Johnny Knoxville-style).
Here’s a demo:
Version 1.1 of iRide features toggle-able sound, the ability to create an account at Linerider.com, and no more entering sleep state in mid-ride. All this for a very reasonable $2.99.
[Available through iTunes]