Well, here is a bizzare story from my school. One of our students, who has only been in the class a few months, suddenly felt the call to fight in a mma match. Keep in mind, his striking skills are alright at best, he's only around 8th kyu or so. So he began training, and started working out with some nearby grapplers. He seemed to be progressing alright. Fight night comes along. He's fighting 3 5-minute rounds, and 15 seconds into the first, he's knocked down and loses by a TKO. He also had to get 4-5 stitches somewhere on his face. So, I guess the moral of the lesson is: Wait until you're a great all around fighter before you get in the ring.