1. Your forums account name: jtbrothers
2. The offender's forums account name (link to profile): In-game name is Speculations
3. A description of what rule they broke/how they broke it: I am pretty sure this is impossible unless you use fly hacks.
4. Evidence/screenshots.
5. The link to the thread(s) with the issue: http://i66.tinypic.com/2egbb6o.png

 

It's actually possible to do this if your one block above the ground and jump at the right time and get hit by a zombie, you can get up onto the roof.

 

Thank you for the report.
Unfortunately the evidence provided is insufficient.
Should you gain more evidence in the future, do not hesitate to report this player(s) again.

Kind regards,
The Staff