Have two partners with knives stand on either side of you and they will decide on their own if they want to push you toward the other or work using the knife with you. You need to read their intention and to survive when you are pushed toward the partner with the knife. It is good to work through drills where you are not in complete control over the conditions and learn to work under tension from different directions and types (body,intelect, emotion). Work with eyes closed or with one limb disabled in some way (push a stick down one of the pants to simulate a cast for example) and see how you fare in that manner. An attack will come toward the weakest of the herd (children, disabled people and the like) and your state of mind is visible most of the time to the attacker so pay attention to this as well and don’t be too obvious.
The same drill can be done with strikes, a whip and anything you find usefull.
And thank you to Vladimir Vasiliev for the seminar in bern Feb 2008.