Ya know when you want to listen to audio in fast speed and you keep hitting "L" multiple times to go faster, but after 1 or 2 speed increases you can't understand the audio?
Try holding down SHIFT and then press L and keep pressing L to go faster. With shift selected the audio will speed up and you can understand every single word.
And to amuse yourself, or your client, hold SHIFT and press J and the audio will start playing slower and slower until it starts going backwards.
Enjoy!