Maybe she took speed? :O

I actually never read Melon's post so I assumed he used the momentum of his first swing to rebound around, stopping a swing part way and going the complete opposite direction (even if the individual is insanely strong) and still catch her seems a bit iffy to me due to how inertia in sword mechanics work. Though Judgment would still need to estimate Itsuki's trajectory based on her size, weight, and jump to accurately predict when and where to swing behind him. Don't know if advanced tactical skills like that are within his ability. Vordak can decide if he would have guessed right or not. Or not as DJ seems to be accepting that he did. (I think)        

Still, I think DJ missed the part though where Melon meant to intercept before he hit the ground. So his post is assuming he's already on the ground from what I read. 

I am wondering though if Judgment is using two hands for his swing. One would probably assume two hands, but his use of the opposite side of his blade( which is an odd choice as simply adjusting his wrist would have actually been quicker.) would suggest one handed. (resulting in a very awkward grip at least as far as I can picture in my head.)