Emergency collision avoidance---what to expect!

We all hope that an emergency road incident never happens and that we never have to react to one with a sudden collision avoidance manuever. That said, emergencies do occur which require us to brake hard, swerve left or right hard, and so forth, for collision avoidance. The question becomes what should one expect the tow vehicle /trailer to do do when an emergency reactive manuever is required? How will your entire rig react to an emergency stop or hard left/ right manuever? You can't know what you've never experienced but would like to understand the cause and effect relationship between you tow vehicle and trailer when a sudden collision avoidance manuever is required. Does anyone know how you can prepare yourself for that which you've never experienced in order to understand how your rig will react to sudden turns, hard breaking, etc.? Is there any reading material out there that will help prepare for such emergency reactive maneuvers? Any helpful thoughts? Thanks.