Soulman
in answer to your question - it's great to be able to break the sound barrier in a fast jet but - you feel nothing. At most you will get a movement of the dials due to pressure waves but there is no physical sensation at all. AD drivers will confirm that we do this mostly every day and it is not a major talking point on the sqn. I quite often was at mach 1+ at 250' in the F3 which is something that the other fast-jet drivers won't have done much.
regards
B