Unity 2D Jump Animation like SWF

Which is the best way in 2D to have the same effect of character jump as it is there in SWF file ?

Currently I am adding Force to rigidbody2D but effect look artificial and not as it is in SWF file.

see the character jump from the egg at splash screen in following link http://dagobah.net/flash/vectortdx.swf

Check this series of tutorials:

http://unity3d.com/learn/tutorials/modules/beginner/2d/2d-overview

You can also design the animations in external programs and import the frames into Unity.