Curtis manages to pull off two of these moments at the very end of the game.
The first was to rip off the real Curtis Craig's organic oxygen mask and leave him to suffocate. Doubly impressive because it might actually be considered an act of euthanasia, and after all the stuff the Hecatomb and Real-Curtis pulled, you would not have thought geeky Curtis would have the guts to pull off that one. Go geek!
The second was to throw Paul Allen Warner into the dimensional portal. Sadly, they do not show this, but it is strongly implied. The aliens had said that the portal was becoming unstable. When you consider all the stuff PAW pulled, he totally deserved being thrown into that unstable portal by Curtis and coming out a-head. Way to go, geek!