The following questions were considered: What were the manual stabbing-energies and -velocities achieved by test persons (50 men and 50 women); what was the sex specific difference in performance; were there differences between the "work-hand" and the "non-work-hand". Five single stabs were carried out with each hand. The impact-energy and the impact-velocity were measured for each stab. Significant differences were shown between the values of men and women, as well as between "work-hand" and "non-work-hand". For forensic purposes the "outer stabbing-dynamics"--demonstrated by the subject--can also be assessed in foro. The quantitative relations between stab-wound and necessary stabbing-energy and demonstrated "outer stabbing-dynamics" give an indication of the intention of the subject.