Movies

When the criminals first came into the lobby and the desk guard was shot, he said something like "pow, two points" then kicks the body out of the way to access the computers.

And later when he directed the defense against the police:
Theo: [as the SWAT Team closes in]
[over the CB]
Theo: All right, listen up guys. 'Twas the night before Christmas, and all through the house, not a creature was stirring, except... the four assholes coming in the rear in standard two-by-two cover formation.

Then: [laughing as a LAPD SWAT armored vehicle is hit with a missile] Oh my God, the quarterback is TOAST!

He may have been intelligent, given his skills with the computer, but he was definitely not a positive character.

On edit: Clarence Gilyard Jr., who portrayed Theo, died on November 28th at 66 years old.