Come to think of it, I think that's the feeling the viewer is supposed to get during their fight against Trunks: Trunks is fighting the same two powers that killed his master, he seems to be holding his own against them, perhaps even better than his master did, he fires a huge blast and thinks he killed them, and then, surprise, the Androids are not even harmed: they have been toying with him all this time, and evidently they toyed with Gohan too.