^ I gotta say, when I heard the news that a skydiver had broken the sound barrier, the first thing I thought of was the Sonic Rainboom.
Glad to see I wasn't alone.
Heh, it looks like Rainbow Dash may have some competition when it comes to sheer speed.
Great, now I have a hilarious fic idea (Equestria's an isolated country on Earth) where Felix's supersonic dive goes way off course and lands him in Equestria. There, shenanigans ensue because he's a supersonic alien who just fell from the skies at mach 1.24. And at the end, the ponies get introduced to Human aviation.
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Of course, if
space diving becomes a reality, Dash will be facing some real competition. According to some calculations I found, space divers reach a top speed of ~Mach 3 (2,500 mph).