Its actually what I use, and I'd like to think I use it as a real strategy. Mostly I use it after I kill someone, in case I get stuck, or if I get ambushed, so I don't get assassinated (and maybe even kill them if they're next to me when I release it). I try not to spam it, though it is fun vs ghosts.
About the Flash: It was great, I like seeing animations about games I play, and this definitely has some thought put into it. Loved the shotty camper, and the story was pretty good as well. Bravo.