Through making parkour maps, I have discovered, with the help of Unholy_Gibbon, that WoM reduces your jump distance. I just thought the community would like to know. If you want to parkour, don't use WoM. By the way, turning off hacks does not give back the longer jump capability. You must turn WoM completely off for you to regain the extra amount of jump length. I do not know if it changes vertical jump distance as well.