Not really heli related - but as aviators you may be keen to watch this. Felix is currently being live broadcast in a helium balloon working it's way up to 23-24 miles altitude to attempt the worlds highest sky/space-dive. He is expected to become the first person to break the speed of sound in free fall. All being broadcast live as we speak, expected jump time 15.30 GMT. They are not sure what will happen as he approaches the sound barrier, and the biggest concern is going into an uncontrollable spin leading to a blackout (as happened to the previous record setter).
Live Broadcast | Red Bull Stratos