So i had been in my class for about just a little bit and me and one of my friends, i think we were new yellowbelts at the time were sparing with one of the second degree blackbelts in class 2-1. When he took my friend down and started fighting with him he had his back to me and i decided it would be the perfect opertunity to take him by surprise, unfortunately for me, i forgot there were mirrors and he looked up and backkicked my straight in the chest. My legs kept going and the rest of my stopped dead and i landed on the floor straight as a board, good times.