Arctic Wolf,Hmm I would say that once the enemy get's hit they need to do a preception roll to see if they know where the shot came from. I know it isn't too good to use a real life example but if someone dashes out from a hidden place and throws something at you, it usually takes awhile before you attempt to look at who threw something at you since you are a bit surprised.
Not according to the rules. See Merric's quote of the rule on page 73 in the above post.