Kenshyuk

Yes, he was fearful of injuring himself, but what you forget is he already had taken that gigantic ball dead-on, and wasn't at his full power when in that state, so it's only natural that he'd be hesitant. But then, the fact that he survived said explosion, after being horribly disfigured by Goku's blast and his own disc that cut him in half, tells me that at 100%, at which point he is around equal to Goku in SS, he would shrug it off with little damage. And as for Cell's blast causing it to go supernova...assumption, albeit a well-founded one, but an assumption nonetheless. My belief is that the supernova wouldn't kill any of the fighters beyond Piccolo and Vegeta and whatnot, but rather kill them by suffocating them in the vacuum of space, or something. Much like what Freeza had intended to do. Because if Freeza, who was only equal to the weakest SS shown in the series, could survive a planetary explosion having been cut in half and blasted to kingdom-come, then surviving a surpernova would be no big deal for the really strong guys at this point, only problem would be like..the vacuum of space, as I reiterated.