Hahahaha, okay... this is really odd, I honestly don't know if I like that or not

I laughed, but from an audience standpoint, it's a total internet inside joke ^^ Granted, many of the people in the audience will be the type to get it, so it may be worth it for a quick joke. I'd say the troll face is so out of place though that it hurts the joke right now. If you could find a way to sort of edit together the troll face onto his face in a good way that makes it recognizable, and makes it like Light is actually making that face, then it could potentially work as a quick joke. Like using liquefy in photoshop and making it a multiply layer so the white disappears and only the black lines remain, then scale it and move the lines to match his face as best as possible, while making a solid to cover his features matching his skin tone. If you take the time to do that well, you may make a pretty epic moment.
The other issue is it's just that it was a long wait for the joke. Not so much of a problem, there are clips that will need a long build-up to allow for laughter for clips before, but maybe not that much. 25 seconds of buildup is too much, but perhaps you could start it at "Ryuuzaki..." instead and shave off a good 10 seconds of superfluous information. That should make it a 25-second clip in total, so it could work to slow things down a bit.
I'm not sure if the troll face fits to that scene specifically, though. It's more just the fact that you used it than its direct connection, but in general that may be enough. But that is 90% dependent on how well you can integrate it into the scene so that it'll fit I believe.
And yes, I did get the audio earlier. Thanks for thinking of me though ^^ The clip's nearly done. Thanks to the girls changing clothing, I have to do a lot of things to make people not recognize they shift from vest to coat throughout both clips I've made, and thus far a bunch of my friends have barely noticed, if at all, so I'll err on the side of letting it be okay that they switch a bit.