He tried and failed to fly, luckily somepony is there to help him out.

[Gotham S2 spoilers ahead] The Earth Pony Detective has to make a deal with a Flightless Pegasi in order to take down Jerome, Barbara, and all those that aid or are involved with them. True Friendship will be the Deal.

She will give up anything just to fly.

Sometimes a chance to show that you aren't what you seem makes a big difference.