Here's something you don't see every day. Twitter user @ohdangitskaelyntweeted a video on Wednesday that showed a dog riding on the back of his owner's motorcycle going down a Las Vegas freeway. "My mom saw this on the freeway today... ", she wrote. The video has been viewed over 750K times so far. The dog has been identified as Sox, known as the_bike_dog on Instagram. His Instagram bio says that he has ridden over 59,000 miles in 6 years.