If silencer owners can get into baaaad trouble by owning potscrubbers and insulation, imagine the outcry this stuff will cause once Maxim's inheritor's lay holt of it!
The world's lightest solid (scoot over, aerogels) is what I'm on about. It's genuine metallic-type metal, it's got incredibly convoluted interior spaces -- and you can customize 'em. The applications are...interesting.
Update: Kudos to Skip, who points out that this stuff might be a useful impact-absorbing layer in body armor. Imagine if you could make the compression and expansion run at different rates (short, hard impact becomes long, slow reaction, actual force -- area under the curve -- remaining constant) or partially anisokinetic by proper arrangement of the lattice.
4 months ago