Ok, story-time!!!!
I belonged to a small spearfishing club a while back. The South African Airforce Spearfing club to be precise. Every wednesday we'd have a small comp. usually diving in cold 10-12degrees water shooting fish generally under 2kg's. Was more of a training session really. After each dive, we'd go for the "DEBRIEFING" at the nearest pub/resturant/etc. After a couple of pints, time seems to fly and in-evitably you end up going home quite late. One of my mates overdid it and passed out. Waking up a while later he returns home at pass 12 the evening. His wife is FURIOUS and demands to know where he's been. The reply ..... honey, i was out spearing!! Obviously the wife doesn't believe him and he gets whacked over the head with his own speargun!!! Wife retorts after whacking him..... "you think i'm stupid?? you left your night vision goggles at home!!!!"
Can now see how a laser sighted gun would have helped my afore-mentioned buddy!!!!

Regards
miles