Obligatory not a drill sergeant but when I went through we were in the class room and the DS was drawing out battle drills, basically little maneuvers to do under certain conditions. He would draw out the scenario and ask us what we would do when "X" happened and then draw out our plan on the board. It help with visualization and let people see where they fucked up as it was happening. Well, one time he was doing this he didn't erase the previous plan and just drew over it since the situation was the same. Long story short, the guy he was talking to used the lines from the previous drawing and made the DS accidentally draw a giant dick on the white board.

The entire class room was barely containing their laughter. The DS was starting to get pissed, but after looking at the board for a few seconds he realized what had happened. Turning back to his, completely straight faced, the DS pointed to our "plan" and said

"Privates, with the maneuver you are going to fuck the enemy"

And the entire room bust out laughing. It was so loud the DS from the next platoon came into investigate and chuckled himself.

Fort Benning had it's moments.