the channel time for the mine is too quick, faster than the human reaction speed. that means if the enemy team moves to the mine all together & ur at the mine entrance (upstairs) waiting for them, you can hit the first enemy to reach the entrance right before they start channeling and they will complete the whole channel before they realize what’s going on – but their teammates won’t & will cancel their channels.
If you do the attack, hit Q and then vorpal you’ll teleport halfway across the map & leave their team confused standing on the outside of the mine trying to figure out where you teleported to, meanwhile you are down in the mine with their lone teammate feasting on their blood.
(of course this doesn’t work if their teammates are slow on the draw or not paying attention)
Happy hunting! The match I figured this out in I hung myself on the mine entrance like a noose and watched in delight as they tripped neck first into me over and over again.