Also surviving black holes is kinda a staple for comic characters, if not outright a salvation ticket ("remember that giant explosion that looked like it disintregated me? Yeah, turns out it formed a black hole of sorts that put me in some other dimension and now I got back baby!")
Currently the biggest feats claimed for Jack are smashing battleships and causing a big explosion in an arena. Even if you think comic-black holes don't count, I'd say continent glassing super-explosions are a whole league above that.