Space-Time Cloak...

Today I was hanging out with my friend while I was wearing a new cloak my grandmother gave me for my birthday. I bet him 20 dollars that I would beat him in a race. He accepted, because he thought that he would beat me. We both put twenty bucks on a table. We got our other friend to start the race. We all got lined up and got ready for the race. "3...2...1...GOOOOOO!!!!" shouted my friend. I stated running and I finally got to the finish line. when I was at the finish line I saw my friend still running to the end. I thought it was a joke but he excepted defeat, and gave me his money. I made a conclusion, I was wearing a magic cloak!