This real strong guy who has fought in legit MMA matches with limited BJJ experience was rolling with me. He has a few months less than me on the mat but that ain't saying much, we are both noobs. I found myself on my back most of the roll and the guy had sick base - he wrestled in high school and college so his base was like at least a blue belt's. At full mount, I was having trouble bucking him off and he'd just keep pulling/using strentgh on my arm. I'd fight it as much as I could, slowly but surely he'd position it just right for an armbar. All this time, I feel his legs getting into position and boom...arm bar. We'd go again, same thing. If I roll into it before he does it, I am sort of on my side and just shifts his body a bit and muscles the other arm...rinse and repeat. Or he'd muscle my arm for a Keylock, fake that and armbar. What can I do to get out of an armbar when I know it is coming? Alot of times, I feel my opponent setting up, like its in slow motion...but I am clueless.