I have a couple of close friends who have completed Selection or been some of the last to drop. You have all describe what a goruck challenge is very well and why its bricks not real world stuff. Mostly because the weight is consistent, easily found and cheap. I might do a heavy in 2014. I am doing Death Race in Vermont this summer so probably won't travel after that for races. Heavy were only created because a couple guys thought the regular challenges were to easy and started doing back to back classes. SERE Performance also does similar events and i find them very cool. Different cool.