"I do not do so actively," Gallador says. "Those strong in the Dark Side can remove themselves and others from the premonitions of the Jedi. I have practiced long and have gained much insight on such abilities. However, if one's connection to the Dark Side adept is strong enough, small bits and dark emotions can be glimpsed..."
You do feel a great deal of hatred and arrogance when you see that snippet of a vision of you in the red cloak.