Action as a result of a critical miss

Greener

I notice that it is possible to trigger and action (cast spell) in the event of a critical miss. Is it possible to trigger an action based on an enemies critical miss?

For example if an enemy misses (critically) could that trigger a spell to give the target (PC or NPCs) a bonus APR for one round? Like a counter attack.

Grammarsalad

Afaiu, the opcode that governs this behavior only targets the attacker:

#361 (0x361) Cast spell on critical miss
Parameter #1: Unused
Parameter #2: Use
Parameter #3: Weapon Category
Special: Weapon Type
Description:
Applies the spell specified by the resource key when the target suffers a critical miss. The target of the critical miss effect is the attacker. 
Known values for 'Use' are: 
0 - Apply Critical Miss chance for both hands 
1 - Apply Critical Miss chance only for this weapon 

Known values for 'Weapon Type' are: 
0 All Weapons 
1 Melee Weapon only 
2 Ranged Weapon only 

So it looks like you could take an attack away from them, or institute an ac penalty, but not grant an extra attack