How does one cap off being trapped in a musical? If you're Barry Allen, you go home to your girlfriend, and serenade her. Judging by the look on Iris' face as he began to sing, all was about to be forgiven. We're swooning right alongside Ms. West.
Cisco [to Wally]: We win and we lose as a team. I'm coming with you. J'onn: Me too. Cisco: Look, J'onn. I respect this whole special agent situation you've got going on. But this problem right here needs someone with... J'onn: [transforms to his Martian form] Cisco: ...green skin and a sick ass cape. J'onn: Call me the Martian Manhunter. Mon-El: I think you'll find that J'onn's a lot more than just a pretty face.
Barry [singing]: I'm your super friend. Your super friend. I'll be there in the nick of time if you're ever in a spot. Kara [singing]: And if not there in time, you can just go back in time and give it another shot! Barry: I'm actually not supposed to do that anymore.