The pic in the previous post is John Heiney, (who holds the consecutive loop record, 52 I think), doing a wing stomp, where you sneak up into your buddies blind spot from above, and give his glider a good kick as you go past...the one in this post is mid loop (one handed, of course). The line trailing out from the basetube is for the VG (variable geometry). It basically acts like a boom vang, taking out twist for high speed glide, and adding twist for launch and landing, gives you easier steering and less glide for short landing fields...