Here's a couple of fights from the 2009 Shidokan Cup in Japan. This is an annual event that feature bare knuckle karate and gloved karate (kickboxing). Shidokan bare knuckle allows clinching, throws and submissions. On the ground the referee will give you 5 seconds to apply a submission. That doesn't sound like a lot of time and you have to be good to do it. It creates a since of urgency to finish an opponent quickly (and that's a good thing). Look for some good judo throws in the first one too (by Ryo Sakai).