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It's race weekend in Daytona. It should be a fun weekend! The annual Daytona 500 is on Sunday, and it's the biggest race of the year. But a scary crash at the finish of a Nationwide race on Saturday is hanging a dark cloud over the weekend's festivities. As the cars were coming around the race's final turn, and just moments before they were to cross the finish line, two cars bumped each other. They were both at the front of the pack racing towards the finish. One car lost control, spun around and into the other cars racing towards it. At least 13 cars were involved. The end result saw the car driven by 20-year-old Kyle Larson fly into the metal safety fence separating the race cars from spectators. The front half of Larson's car was completely ripped off. The rest of it ended up in the grass at the center of the track. Amazingly, Larson walked away unharmed.

But the same can't be said for some of the spectators. As you can see in the video above, the crowds around the fence were packed to see the end of the race. Larson's car and engine ended up smashing into the fence. The engine managed to puncture it. USA Today's Jeff Gluck has been tweeting updates live from the race track. He compared hearing the crash live to a bomb going off. At least five spectators were taken away on backboards by medics. There seems to be spectators injured in the upper deck of the stands, too. One fan was able to snap this picture of a tire that flew into the upper part of the stands:

Whoa. Look how high up this tire landed. Unreal. twitter.com/RyanEversley/s… — Ryan Eversley (@RyanEversley) February 23, 2013

This is a stream of ambulances leaving the racetrack:

A long line of ambulances taking injured fans out of Daytona. twitter.com/MrEnduro22/sta… — Mike Rainville (@MrEnduro22) February 23, 2013

And this USA Today photo perfectly captured the moment Larson's car flew into the fence.

Photo of Daytona Beach race wreck from @usatodaysports - twitter.com/TheMatthewKeys… — Matthew Keys (@TheMatthewKeys) February 23, 2013

Details are still coming in and we'll update this space as we hear more.