back in the day in the army they didn't have guys hawking you watching you actually take your junk out and piss. i used my enzyme cleaner (for contacts), put a nice big squirt of that on top of my piss and then shook it up before giving it to the handler. believe me, the guy probably threw it in the nearest trash can as soon as he could as it foamed up so much the top of the sample lid shot off like a bottle rocket. and no back then (in it's infancy) these guys that got called on to take and receive samples were usually low level supply sergeants and they had a lot more on their mind then sitting there watching in a latrine on a folding chair some guy going "i just pissed 2 minutes ago etc. etc". i'm sure they would have gladly had anyone walking down the hallway at that point come in and piss.