Farmer walk 255 each hand. 20 yards x8
Heavy prowler (on carpet sucks)
20 yards x 8
45 degree back raise x12 holding 60lbs KB x4
Paired with Charlie Weingroff style bear crawls with chain 20 yards x4
Simple but fun work out.
If you train people for a living, the sooner you figure out not everyone is a good fit for you, the better. The key is to scare those people away from the get go.