Once the two were a bit more separated from the group, Jake gave a few stretches to try to limber up best he could. He was in rather casual gear after all, and it wasn't the most optimal time for a spar. But he guessed if they turned themselves into superheroes, they'd never really get to choose when to fight. It'd just happen.

Either way, he got into his boxing stance pretty quickly after that, clearing his throat and giving her a nod as he tries to think of...really what to do or say next.

"So uh...guess we should establish some rules then? Nothing serious, hold back the punches? And don't worry. Not hitting your face even a little. There's a serious fine for destroying priceless art after all." He tosses out a wink and sticks out his tongue, a little more comfortable with it being just her and him now. Sure, anyone could pop over for an observation and he knew Karkat was on the prowl...but at least it was just him and Jane for the moment.