Obstacle #1
Obstacle #2
Obstacle #3
Obstacle #4
Obstacle #5
Obstacle #6
Obstacle #7
Obstacle #8
Obstacle #9
Obstacle #10
Obstacle #11
Obstacle #12
Obstacle #13
Obstacle #14
Obstacle #15
Obstacle #16
Obstacle #17
And there were four more obstacles along the path, bringing the total to 21.