Everyone ducks for cover. The Imperials, confused at your actions, stop to turn and look behind them
At that moment, the droid opens fire and the corridor is filled with blaster bolts.
Hot blasts of plasma shatter bits of wall and ceiling, and tiny bits of debris rain down on you and all you can do is cover up and wait for the rain of hellfire to end.
After what seems like minutes, but was probably only seconds, the rain of blaster fire stops. In the quiet that follows, the only sound is your breathing and coughing from dust, the occasional sound of loose debris falling, and the "ping ping" or cooling metal.
Then, you hear the sound of heavy metal feet moving. The droid comes closer and closer, stopping perhaps 10 meters from the doorway. It pauses.
In the eerie quiet, you hear a metallic voice say, "I cannot keep the droid under control for long. You need to hurry. I have been found out - reinforcements were already on their way before you attacked."