a good marshal wont be distracted by having a drink,he will choose the right moment when its quiet around him to have a quick drink..a bad marshal doesnt need an excuse to be bad.

marshalling has to be the simplest thing going..you watch them into your area,you watch them out of your area and when its quiet watch other close sections just incase some numpty is asleep on duties.

i always try to take a drink out with me when its warm during long finals..dehydration causes muscle cramps and slower reaction times,you dont want the marshal to be slow now do you