stress drills can be fun useful and quite humbling to some shooters. Try sprinting 100yards then see how well you can keeping in the 10 ring @ 21 feet.
BUUUUT (always one) This may sound dumb or unnecessary but I feel obligated to post it.
With drills that induce stress I always ALWAYS say that you NEED a friend with you @ the range. Your methods could be perfect but accidents happen. A trip, stumble, anticipation or even equipment failure could result in an unintended discharge and or a serious possibly life threatening injury. If your a few hundred yards from your car or miles away from town even the wait for the ambulance could prove fatal. So having another person there is a great idea.
I suppose that could go for any range trip but I feel that it particularly applies to this sort of practice.