Twitch + Hurricane
His ult has a strange interaction with hurricane.
When your ult is on, the runaans bolts will strike at pretty much anything, acting less like runaans bolts and more like individual twitch autos.
The angles they can go at far exceed the regular small area in which they normally hit things.
Because I don't have footage, I have made a wonderful MS paint drawing of Twitch fighting Malphite, Taric, and Soraka with approximately the angles at which hurricane bolts can hit.
I know, my work belongs in the Lourve.
Now, here is the important part:
If this is unintended, Riot, don't fix it.
This is hilarious, and helps Twitch be a nightmare in teamfights.