Just finished an excellent weekend of carbine training with COA in Holland, MI. The instructor, Johnny Primo (former Army Special Forces), is the real deal and teaches more than just firearm skills; he also teaches a "warrior" mentality. The final part of the course involved a "stress test" that involved carrying a 100lb bag 50 yards, 40lb over-the-head bag tosses, duel 45lb dumbbell carry in sand, and overhead extensions with a 25lb bounce ball....all of these components were done in sets or multiple times in between shooting C-zone steel at 40yards and 2"x4" box at 3 yards. The average time for completion was 8.5 minutes and everyone was worn out afterwards. Highly recommend if you want to be tested physically and mentally!

He's on my short list of courses I really want to take. That sounds awesome.