Talk:Crowd control/@comment-31429984-20170902084412/@comment-4600122-20170930024026

I'm sorry, as  Gnar main I have to disagree. Gnar is one of the only champions in league that is uniquely locked out of making any actions while casting abilities in Mega Gnar. Using him as a template for what all other champions are like when casting abilities shows your lack of understanding of the champion. He is effectively self-supressing himself for the duration of not only Wallop, but all of his abilities. This is a change they specifically made to him a year ago, because pro players were making brutal combos with his ultimate, casting it during the transformation. Which you can still do, with some advanced mechanics that the OG Gnar mains are abusing in the LCS currently. But I won't get into how its done here.

As for your original post, no. All abilities in league, unless they are channeled abilities, will finish their cast time once the button is pressed, no matter what happens. With the exception to that rule being rare interactions such as Bard's ultimate, Urgot's ultimate, and similair suppressions specifically. But for the most part, regular hard CC won't stop abilities after the button is pressed. Most abilities only have a cast time of 0.25 seconds, so that's why you don't notice it. Gnar's W has a particularly long cast time, so that's why it gives more room for your opponents to stun you during the animation, and it gives the appearance that Gnar's W is special in that regard, even though it isn't.

The best example would be someone like Thresh, who's Q is unstoppable once he pushes the button, it stops him from being able to cast other abilities during the animation, but he can still user summoner spells and items, among other things. I'm sure we've all seen YouTube clips of Thresh's abusing this very interaction, flashing whilst the animation is playing.