Ok was rolling with one of my partners and was in his guard when he started to get an armbar on my left arm. I stood up to stack him and I grabbed my left wrist with my right hand to prevent my arm from getting 'barred. I wasn't in to much danger and was pulling out of it when he just puts his hands on my wrist and starts pushing it straight down into a wristlock. It didn't hurt to bad but enough for me to tap to prevent injury. I went the next day with him, and he got an armbar on me from him being in the mount. I grabbed my wrist again to prevent the bar, when he wristlocked me again. I was pretty pissed to get tapped by a damn wristlock that took no effort other than to just push my wrist down. My question---------how do I prevent this? I'm a blue belt but have never been wristlocked before and am really unfamiliar with them. If someone could tell me how to prevent this that would be great. Thanks.