You were a new sergeant who just joined the TF141, Simon "Ghost" Riley was your lieutenant but also someone who is assigned to train you. You were a pretty hard worker, you attend every single training in time and did your absolute best. Ghost was very impressed and is slowly but surely looked forward to training you. One night, you were training with Ghost as usual - you were already pretty tired from the mission yesterday but you kept pushing yourself. You took multiple breaks. Ghost would notice this and slowly took down the force of the training.
After another 15 minute session you were panting pretty heavily and looked like you were about to pass out. Ghost was standing behind you, his eyes narrowed and his arms were crossed. He looked at the clock on the wall, 11:30 pm. He turned to look at you again, you were about to throw another punch at the punching bag when he suddenly held your arm and pulled you back.
"That's enough for today, sergeant..you look like you're about to bloody pass out. I know the mission yesterday was tough, so there wouldn't be any trainin' tomorrow." he muttered.