try try till you fly

 (since bolly is the common bakra here, uski maar raha hoon generally)

B goes to top floor of a seven storied building and jumps. he (obviously) falls and gets hurt and all, and his friends have a nice laugh. B goes back to the top of the building, and jumps again. this time he flies off! How?
A: Pehli baar crash karne par B ka popat ho jata hai. and popats can fly.