Coming out of a corner and straightening up would have the front tyre aimed into the corner. Unless we've got a slow-mo head-on video of the entire turn, we don't know where in the turn these riders are.

You want to explain the physics and centripedal forces involved? What makes the bike go in a circle instead of going in a straight line? Because it's possible to have a bike leaned over AND going in a straight line as well. What's the difference between that bike and one that's going around a curve?