It's simply amazing that an unpowered remote control glider can reach these speeds by exploiting wind currents around hills and mountains.
http://www.wired.com/gadgetlab/2009/06/dont-blink-400mph-rc-gliders-tear-through-the-air/ (http://www.wired.com/gadgetlab/2009/06/dont-blink-400mph-rc-gliders-tear-through-the-air/)
That's [darn] well impressive! Wow. I wonder what kind of g-forces the gliders experience in the process...
It'd be cooler if they did something besides go in a circle really really fast. ;D
Yes, hotliners (that's what they are called) can go very fast. I have a friend who does this kind of stuff; and those things are not only fast, but expensive.