Feel free to use this proven exam if you ever find yourself faced with a possible Morello impostor. Skip to about 3:30 to hear Good Guy Morello, which forced me to administer the test.
I feel bad that I kinda fanboy'd on the guy like this but he was a good sport about it. Hopefully Morello or his incredible likeness will join me for some more rounds so I can think of more terrible League of Legends jokes to make when Morello kills me.
If you're interested in seeing the whole games I played with the man who is perhaps the most incredible vocal impersonation talent ever, videos are on my stream. I'll try to cut out highlights of the full games tonight.