We've all done it: you go to merge into the other lane and WHOOM! Someone flies up in your blind spot. Most of the time, you correct your mistake and wait for them to go by. But this poor driver swung back into his lane too fast and spun out, dominoing into the other lane, which sent the car he hit into a different car. Thankfully, no one was seriously injured, but it just goes to show you, you have to keep your cool on the road.