The best is using it to drag an enemy in/out out of their base if they are close to the wall. If you want to be a real jack ass, you can make it vacuum them into unpathable terrain, and be stuck there till they get a TP scroll.
Oh, that reminds me of the game where Mila jumped onto the cliff above where the Radiant Ancients Spawn as PotM, and simply got stuck there. Eventually Bounty Hunter was able to toss enough of his Q to kill him, though I think that got him killed soon after.
Damn, you're right! Didn't even think of doing this yet.
I rememer that moment too haha, not sure if he lept there on purpose or not.