Install this outside a bar.
On the next bar fight, use this sentry bot to spray high pressure water at troublemakers.-- mofosyne, May 23 2012 with smartwater-- not_morrison_rm, May 23 2012 Why not heavy water? Also, needs an appropriate category.-- normzone, May 24 2012 Arent sentry bots automated? or would you only activate it when the fight started?-- erenjay, May 25 2012 I've got something like this; herons laugh at it because under the Wildlife and Countryside Act 1981 I can't just shoot them.-- Phrontistery, May 25 2012 Please don't shoot the herons. My favorite animal of all time. (Next to cats, of course.)-- blissmiss, May 25 2012 Then I won't tell you that a heron ate my neighbour's Russian blue.-- Phrontistery, May 25 2012 Must've taken some heavy fiber to push that through.-- Alterother, May 25 2012 random, halfbakery