When you saps the Sentry Gun with Red Tape Recorder but it takes too long to to reverse it and decide shooting it with a Revolver before the Engies comes. : r/tf2
Steam Community :: Guide :: The Observer Spy
Red Tape Recorder Rebalance : r/TF2WeaponIdeas
New TF2 Update- Sound Files for the New Red-Tape Recorder Spy Sapper - YouTube