I just want to chime in and say: It´s fookin´ stupid how Vegeta and Son Goku think they can kill immortal enemies by simply overpowering them. Even worse that it seems to be working, looking at Black´s stressed out reaction to Vegeta´s power.
And FUCK YOU, Mai. This special plot-no-jutsu bullet could be a million times stronger than a normal bullet, it still wouldn´t be near as powerful as one of Goku´s standard Kamehameha. Seriously, that scene was infuriating. Any person with a brain would accept that Black is out of a normal human being´s league. Maybe Kuririn could do something. ;>