The title reminds me of this: http://img.ifcdn.com/images/09a2cdc79d00b7989426820f7cb2e3fe9540ee52c1bf24bb327c36f7b73bc9d5_1.gif
Of course you know that they are going to to that, so you cancel the ult as they dash and you're on top of them with no escape.
I. Fucking. HATE. That.
I'm a sion main, (specifically ap sion), and my buddy I always duo with went through this trundle phase, where he'd freaking pillar my ult, and cause me to veer violently off to the side. OMG the rage man. lol. He's since swapped to hecarim, and ults them all out of my ult.... Come to think of it, I need to find a new duo partner. XD
and then your team spam pings you as you try to escape from your major fuck up