My answer to Has there ever been a recruit who couldn't be intimidated by the drill sergeants? How did that go?
Answer by Ken Larson:
When I was a drill instructor at Ft. Leonardwood, Missouri. I was assigned to deal with a trainee who was lagging behind the platoon on a march.
Attempting to achieve some sort of benefit to the individual before escorting him back to the barracks for a medical check, I was in a leaning rest position facing him as we performed push ups together.
Little did I know that the reason for his laggard behavior was that he had packed 3 canteens of water with him and had consumed them all.
As we faced each other, he regurgitated in my face.
Suffice it to say we discontinued our training at the point and went on to the lecture circuit.