At bootcamp I had a drill sergeant, the biggest dick I ever met in my life. Everyone in my company wanted to murder him in cold blood.
We would go for breakfast after the morning run, and once we were eating inside, he would come in the restoraunt, and he`d force us to eat while we`re doing small jumps, and if one of us dared to speak, that was it, no more breakfast, out to run again with half full stomaches from the food, hell, even today I can sense the food coming up my mouth ready to puke from the running.

He`d use to wake us at 4 am to do a role call with full gear, and if someone wasn`t ready at the given time, all the others would do push ups until he was.
Or, we were ready to go out with 6 hour passes, and if someone dared to speak during the role call, he would make us run around the barracks until he was done with the role call, a role call with 200 names on it

Trashtalking, waking us up brutally with kicks on our beds and every other annoying shit a man can do to annoy others.
BUT.
Last day at bootcamp, he gathered us all and he gave us a speech, he knew everyone hated him and he was glad for it, because everything he was doing to us, it was made to make us be ready in a case of war, there will be times that you`ll have to run after you have eaten, there will be times that you`ll have to wake up and be ready in 3 minutes or less, because the enemy will be attacking.