All you SeeYou users have probably been doing this
already but just in case:

Lets say another SeeYou user with satellite raster
maps asks you what its like to fly from X site (which
preferably has a bit of terrain around it). Send him
the IGC file of your most relevant flight from there.
He runs it in SeeYou 3D view and uses Ctrl F7 to lock
the view from directly behind the little glider. Then
he can pause play and scroll forward up to and through
the body of the glider (you creep up behind and then
through the little pilot in the glider) until the view
is that of the pilot looking out of the cockpit. Then
he restarts play ( still in Ctrl F7 mode) and gets
the pilots own view of the terrain through the flight
with the ability to look left, right, up and down exactly
as if he is looking about from the real glider cockpit.
He can even look out at your (disconnected) wing tips.
This gives an incredibly realistic replay of how it
looked during the flight - much more so than watching
the glider replay the flight from outside of it.

Also a fun way to replay your own flights. Well -
I'm easily amused at this time of year.

John Galloway