@wisefool83: right after first launch with rocket, go a little to the right and fall down to a kind of a hole. There are some baddies, treasure chest on the right side and a barrel rocket in the middle. Take barrel and go immediately to the left, as much as you can. Rocket will explode on the roof. when you fall down, you'll land on the net. (I think) that's the only butterfly net on the level.
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