I have been watching several games played both local and in battle reps where Harlequins have danced around the battle field jumping up to the highest towers and back down again without any penalty. I though this ability had to do with the flip belts but upon further inspection the rules seem not to support this style of play. So have we all been playing this wrong? Can anyone clarify.

Flip Belts allow you to ignore being slowed by difficult terrain but does that mean you also can ignore the Vertical Movement rules?