Getting smoked

I only could find smoking weed questions when I searched so here goes;

What is a smoke sesh in the army or marine corps? Like 10 minutes of pushups? I hear a lot of different stories some people say PT for hours, other times I hear that only 20 or so pushups are done at a time so I really have no clue what is considered normal.

Obviously in selection (of any kind) its gonna be harder than regular bootcamp. Ive always gonna be a lot of total volume like i think ive heard a marathon of running every day during hell weeks, or 3000 pushups in a day. Also im aware of certain exercises sucking ass like sugar cookies -- covered in sand having to do stuff so you chaff.

I also have heard of drown proofing, but i dont know that it would be considered smoking.