I certainly don't miss those 'machine gun' US ATC clearances! Listening to someone suffering one of those once, only to ask for it to be repeated twice, I was amused to hear an anonymous voice over the ether say "Speak fast? Speak twice!".
An EW Canberra crew once had one of those 'Let's see how fast I can talk' clearances delivered at General Hiram B Chickensexer AFB or wherever, concluded by "Readback". So they simply played back the recording they'd just made.....
