Board Thread:Wiki Discussion/@comment-5645428-20141026124151/@comment-5645428-20141026205419

As it stands, by moving the second last block to the left a bit is what needs to happen for that to work on Back on Track. I recreated the scenario in the editor, and despite what I said earlier, it is in fact naturally impossible. Block + block + spike + spike: hitting the very left of the first block will always result in clearing the last spike.

Rumour has it that the achievement will be changed from 99% to 95-99% in the next update, although that information was received from YouTube comments, I believe.