If you institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the implementation of the specificati

If you institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the implementation of the specification constitutes direct or contributory patent infringement, then any patent licenses for the specification granted to you under this License shall terminate as of the date such litigation is filed. This part piqued my interest. So if I sue some third party because I feel Google's implementation of Wave violates my patent, I lose the license to the Wave patents? Or if I feel that a third party implementation of Wave violates my patents, do I also lose my license? Eg. if a Wave implementation violates my (say) encryption patent, and I file a lawsuit for patent violation, do I lose my license to the Wave patents? Seems like a neat way to scare off patent trolls, but I'm not sure I'm interpreting it right.