Tasers arent effective because they "OH DEAR GOD I CANT MOVE", they are effective because "OH DEAR GOD I GOT ELECTROCUTED AND I HEAR A ZAP AND AHHH".
Psych tactics are wonderful, neh? Anyway, for those that dont want to risk someone not caring about getting tasered, stick to mace.
Mace them while they are standing. Mace them while they are falling. Mace them once more while they are laying. Leave and call the police.