Impossible

Great game. Very addicting. But I think they have made some levels purposely impossible to try to make you purchase the skipping option. Example: acrobatics - mount magma.
@jeffwantsasandwhich - very simple. Shoot your first arrow over the plane target balloon. So you create a hole in the wall. Then shoot your second so you hit the target plane balloon and the pin balloon. Use your aerial support. Then hit the last pin balloon.

dfn89 about Bloons 2, v1.1.2