One thing to remember is that squad leading is a rather intense job, and sometimes you need to unwind a bit. Most people are unable to stay sharp for hours at a time, especially if there is sustained hectic fighting, which is the kind of situation that requires the most from SLs, in my experience. So reminding the SL that they need to re-focus on the fight is something that I have done on a number of occasions, and something that I encourage other people to do, if they feel the situation requires it. Just do it gently, please.