Rob over at Muay Thai Focus does such a great job with the photos of the big matches in Thailand.
That said, I love it when I see a technique that I have been working on in class shown in Rob's photos. This is a classic clench defense, the "China Wall". The object is to keep your opponent away from you and keep them unable to knee you in the clench - then, when you are ready, you drop the wall, kick your hips back, and give them a quick knee. Click for bigger.