User blog comment:DoctorAsawa/The Perfect Jungler (Or Somewhere Close)/@comment-108.172.56.143-20121023220455/@comment-5266525-20121026144004

'... and has a free refresh while touching it.'

It's EXACTLY because of this mechanic that it's hard to master.

And it's not even a true a refresh, it's a flat 4.5s reduction. The slow doesn't last that long and even picking the axe up immediately won't keep your opponent perma-slowed without sufficient CDR. So you have to be on-target with every single axe you throw, AND you have to throw it such that you can pick it back up in optimal time.