In close combat I often want to flip or trip enemies across my body. For instance last night I wanted to flip an enemy that was in front of me into a fire that was burning behind me. This seems in the realm of possibility, but all the rules allow is for me to either grapple/hold the enemy and walk both of us into the fire or to move behind the enemy and shove them into the fire.
Obviously I don't want to walk into the fire, and moving away and back takes a while and allows opportunity attacks.
How do I deal with this type of action? Basically the action is either a shove that is not in the direction I am facing, or it is a grapple and move where I am releasing the enemy in an adjacent square.