Xerath (Ultimate move 'R')
When I was playing against Zarsin13, I proc'd my ultimate "Rise of the something' and while in that mode, he had head smashed me. This temporarily stunned me, but once out of the state of stun, I was still unable to use the Ultimate. I repeatedly clicked 'R' but for some reason it didn't work. It was a 1 v 1 custom crystal scar mode around 7:40pm PST. If you could check this out, I'd appreciate it.