On Citadel Station in the Czerka office.
Guard to utility droid, "What are you doing out of the computer room? I think someone needs a memory wipe." (great tone as if talking to a dog or baby)
Utility droid, "Breet whoop dee-deet!" (proceeds to kill guards)
I love that and all the lead up where B4D4 is talking to the utility droid and twisting him into thinking everyone is his enemy.
Droids are by far the comic relief in both games.
"Systems failing, Master"