Full speed downhill, then the chain popped off when I did a hard skid right before the intersection. A near death scariest moment in my life. Lucky that Downtown San Diego drivers were generous enough to let unstoppable me to go through freeway exit intersection, and that I had 'emergency' brake on my top tube (Surprisingly, it actually worked pretty well)
Lessons learned : When you hit the light, never skid, pedal harder!
Xenon frame is great, but use it with trick gear ratio only. You'll blow off your chains with 3.13.