Today I put a twister on a guy at our gym. I felt like I had everything perfect, lockdown stretched out, tight s-grip on the top of head, felt perfect but he didn't tap. Even went defcon on him and he still didn't tap, though I could hear him grunt in pain. Eventually the round ended. My only guess as to why he didn't tap was because he is WAY taller and lanky-er than me. Is that a common with tall, lanky, flexible dudes?