Heard this one today on my KSNA feed of a Nasa F-18 doing flight testing over the water off of Dana Point, CA. Clip is edited to only contain communcations from the controller to/from and from the aircraft.
I thought it was pretty cool how fast the pilot brought it down from 8,500 to 4,500, I left alone the elapsed time in between the approval for decent from the controller and the pilot calling level 4,500 to give you an idea. -15,000ft/min?
When done, he picked up an IFR Clearance over the closed El Toro Marine Base back to edwards (excluded from clip)