Stand or sit with a knife in your hand and have your partner move around you and near you with the goal of coming in close so he can control you without being hit with the knife. You let him move as close as he can and only strike him when you feel aggression from him or when you recognize an attack. This is a good drill to learn to recognize the aggression in the early stages and take care of it and to also learn not to place yourself in the path of the blade so if you are with no other option you will still be able to survive against an armed assault. This can also be a crowd drill with all walking and one has the knife hidden and only takes it out when he or she has to and remember that in life we will move so don’t defend the spot you are on, move so you can keep moving and do the least amount of harm to get the job done. Start from a standing or sitting position to learn to move yourself as little as you can and learn small movement with the knife and on the approach and later in moving it will pay off in efficient movement and in keeping free to move.