What you want to do in this level is to have the bird bounce back and hit the last structure. From there, a chain reaction will be created and the other 3 structures will collapse as well. If you do not get all under 1 hit, just try again until you get it all to bounce and hit one another correctly.

[youtube width=420 height=345 time=26]http://www.youtube.com/watch?v=9-hjAY0XpvE[/youtube]