1.Your ingame name: xXNinjaChuXx
2.The offender's exact ingame name: I_Gunna, Juluil, MegaFlight
3.A description of what rule they broke/how they broke it: Most likely fly hacks or a glitch abuse. I think its fly. They all some how finished the parkour when the parkour is unfinishable.
4.Evidence/full screenshots.

 

You can easily finish the parkour without fly hacks, as I have done it myself. It's not impossible.

 

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