Jennifer and Ninjiro try to do a little duet, but Jen quickly learns that while you can teach a ninja to like the same music you do, he might interpret things a bit differently.

I want it to be known that I was actually laughing my ass off drawing the last two panels of the main comic after giving Jenny a big stupid upper lip like that.

I'd like to think the comic works even without context of the original song, as it could be any number of misheard lyrics, but for those who really need to know it's this one. I'll admit I always thought he was saying time machine, and I believe it to absolutely be that way in some of the song's covers, but after listening to it closely I can hear devil machine. According to Google that's what it is, but Genius would have you believe it's dull machine (???)