I have only been to a few classes, so I know it will come eventually, but when I am in open mat, I feel really defensive and cannot mount an offense. I am a natural at getting the back position. Any time I tap someone it is from the back. Now, my problem. I will usually give up good position early and get mounted or side-mounted. I feel completely helpless, and can only sit back and wait for them to try a sub before I can gain better position. What are some things I can practice to get out of mount/side mount? For example, I got mounted, tried to bridge, and ended up giving up my back. I got in his closed guard eventually, and he slapped on a triangle. At this point, I grabbed his right lapel with my right hand, and brought it against his windpipe, stacked him for leverage, and he eventually let go of the triangle. I am just hap-hazardly using strength and speed to get out of attempted subs, and can't do anything until they try a sub.