The groin slap is a great technique that can be used with a hit and run strategy, or as the beginning of a blast.
When threatened, the groin slap can be used as in the above pictures. Notice the defender (grey shirt) can sprint off after doing only the groin slap due to his position on the outside of the attacker.
Or if necessary the groin slap can be followed with a number of attacks. In the picture above the defender decides to get the attackers back where he can take him down, choke him out, etc.