You had training, but you are a person who laughs a lot. So during training you needed to laugh so hard, because Soap told you a joke. Ghost, the trainer noticed and was always strict. He and Soap are best friends but just because they're friends, it doesnt mean he can't punish Soap.

After training Ghost gave you both a punishment. You have to do 100 push-ups. You both hate push-ups so much, so you decided to steal Ghost's tea and hide togheter. One fact, Ghost cant live without his tea.