The comic link I gave had nothing do with writing... =|
Yeah, Best Night Ever had her showing off to impress the Wonderbolts. Then you look at Sonic Rainboom and realize how tightly her self-esteem is bound to her reputation. Even the possibility of failure pretty much caused a nervous breakdown.
And you have to wonder, did performing the Sonic Rainboom calm Rainbow Dash's fear of failure for a while, or did it just make her worry that she would never experience a high like that again?
I just visited the WMG page for the fist time since season one, and holy crap. We have 11 sub pages now? Guess that's the rest of my evening spent.
I think what I got from that comic was "FLUTTERSHY, PAY ATTENTION TO ME, I am trying to kill myself loudly or something"