It would be possible as well if the skydiver were to create an aerodynamic attitude while falling. Terminal velocity of a person occurs because of drag associated with the average profile the person would present to the air rushing by. All one would have to do to increase speed beyond that nominal amount would be to get into a vertical position and put hands in front to create a missile-like arrangement.

I used to launch high powered rockets and these things would attain 10's of thousands of feet in altitude. Normally, they'd eject a parachute at the apex of their flight and return nicely but occasionally they'd not open up for deployment. The wild thing would be hearing them break the sound barrier as they'd fall nosecone first towards the ground. I'm not sure what terminal velocity for a javelin would be but my guess it'd be thousands of miles an hour.

Art