I'll risk being flamed for this... John Wick it during practice. Seriously, shoot & move...move a LOT. Just standing there at the range popping targets is nice, but NOTHING about a street scene is anywhere near that clean-cut. You'll be lucky if you even GET to aim. Chances are just as good that you'll be point-shooting (hope you practiced that!) at funny angles. Practice shooting while walking backwards & side-to-side. Hope you've got some Martial Arts in your background, maybe at least be able to kick an opponent's knees or other locations to push them back...a stiff-arm ain't out of the realm of possibilities either... and it likely won't be just ONE opponent... Wouldn't even be a bad idea to wear a motorcycle helmet & have a buddy bash you with a 2x4 to see how you react to a hit from behind...see if you even retain the squirt gun or can even squirt him with it after the hit. Do you even know how you'll react to being hit somewhat randomly?? Have you ever taken a hard blow?? Chances of getting into a Weaver Stance or a 3/4 stance are actually somewhere around effing slim to none. The only benefit of gunfighter stances is that the bullet tends to pass thru front to back instead of the much more deadly side to side heart/lung shot. One lung hit is survive-able, getting two hit cross-body means trouble. Cop train Weaver & 3/4 because they're ALREADY standing in position to do so, and tend to have the escalation somewhat planned. They knew there was "trouble" when they got to a scene, regular folks aren't expecting it. Open Mind, prepare for the worst...hope for the best.