Why would you presume....
The Sgt did this run 12/15 years ago and has nothing to prove. They are there to oversee the training exercise. Just like a pilot who trained 10 years ago would not land a plane with a trainee on board... you have to do it yourself.
Not quite true, most if not all runs are taken by either Tp Boss,Tp Sgt or one of the Cpl's. No-one sits in the safety vehicle other than the Medic. (Which is great when everyone of the buggers is an ML)!
